Fix issues related to Moodle coding standards

[golenkovm]

This is to resolve the following coding style issues:

webservice/restful/classes/privacy/provider.php
[(#27) Unexpected MOODLE_INTERNAL check. No side effects or multiple artifacts detected.](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/classes/privacy/provider.php#L27)
[(#46) Method name "_get_reason" should not be prefixed with an underscore to indicate visibility](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/classes/privacy/provider.php#L46)
webservice/restful/db/access.php
[(#29) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/db/access.php#L29)
[(#31) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/db/access.php#L31)
[(#34) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/db/access.php#L34)
webservice/restful/lang/en/webservice_restful.php
[(#30) The string key "noauthheader" is not in the correct order, it should be before "restful:use"](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/lang/en/webservice_restful.php#L30)
[(#32) The string key "noacceptheader" is not in the correct order, it should be before "nowsfunction"](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/lang/en/webservice_restful.php#L32)
webservice/restful/locallib.php
[(#66) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/locallib.php#L66)
[(#72) There should be a comma after the last array item in a multi-line array.](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/locallib.php#L72)
[(#75) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/locallib.php#L75)
[(#95) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/locallib.php#L95)
[(#268) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/locallib.php#L268)
[(#295) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/locallib.php#L295)
[(#310) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/locallib.php#L310)
[(#311) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/locallib.php#L311)
[(#312) There should be a comma after the last array item in a multi-line array.](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/locallib.php#L312)
[(#313) There should be a comma after the last array item in a multi-line array.](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/locallib.php#L313)
[(#418) Logical operator "and" is prohibited; use "&&" instead](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/locallib.php#L418)
[(#428) Logical operator "and" is prohibited; use "&&" instead](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/locallib.php#L428)
webservice/restful/server.php
[(#32) Expected login check (require_login, require_course_login, require_admin, admin_externalpage_setup) following config inclusion. None found.](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/server.php#L32)
webservice/restful/tests/server_test.php
[(#37) Testcase webservice_restful_server_testcase should be declared as abstract.](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L37)
[(#37) PHPUnit testcase name "webservice_restful_server_testcase" does not match file name "server_test"](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L37)
[(#37) PHPUnit class "webservice_restful_server_testcase" does not have any namespace. It is recommended to add it to the "webservice_restful" namespace, using more levels if needed, in order to match the code being tested](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L37)
[(#42) Test method test_get_headers() is missing any coverage information, own or at class level](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L42)
[(#42) Test method test_get_headers() is missing a return type](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L42)
[(#43) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L43)
[(#57) There should be a comma after the last array item in a multi-line array.](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L57)
[(#59) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L59)
[(#83) Test method test_get_wstoken() is missing any coverage information, own or at class level](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L83)
[(#83) Test method test_get_wstoken() is missing a return type](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L83)
[(#84) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L84)
[(#108) Test method test_get_wstoken_error() is missing any coverage information, own or at class level](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L108)
[(#108) Test method test_get_wstoken_error() is missing a return type](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L108)
[(#109) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L109)
[(#123) Test method test_get_wsfunction() is missing any coverage information, own or at class level](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L123)
[(#123) Test method test_get_wsfunction() is missing a return type](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L123)
[(#124) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L124)
[(#142) Test method test_get_wsfunction_error() is missing any coverage information, own or at class level](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L142)
[(#142) Test method test_get_wsfunction_error() is missing a return type](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L142)
[(#143) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L143)
[(#157) Test method test_get_responseformat() is missing any coverage information, own or at class level](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L157)
[(#157) Test method test_get_responseformat() is missing a return type](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L157)
[(#158) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L158)
[(#181) Test method test_get_responseformat_error() is missing any coverage information, own or at class level](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L181)
[(#181) Test method test_get_responseformat_error() is missing a return type](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L181)
[(#182) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L182)
[(#196) Test method test_get_requestformat() is missing any coverage information, own or at class level](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L196)
[(#196) Test method test_get_requestformat() is missing a return type](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L196)
[(#197) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L197)
[(#220) Test method test_get_requestformat_error() is missing any coverage information, own or at class level](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L220)
[(#220) Test method test_get_requestformat_error() is missing a return type](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L220)
[(#221) Short array syntax must be used to define arrays](https://git.in.moodle.com/pluginsbot/moodle-plugins-snapshots/blob/747ccf27ad8a2ed7f45f99c55b54d5886ca7a092/webservice/restful/tests/server_test.php#L221)