Treat KeyboardInterrupt exception as != YES

[szaydel]

It looks like right now when a confirmation is interrupted via CTRL-C, it results in a crash that looks like the following, as a result of not handling a KeyboardInterrupt exception raised by readline.

$ corelight-client smartpcap storage shutdown

== Confirmation required ==

This will shutdown Smart PCAP external storage, which requires sensor reboot to resume the capture function.

== To proceed, enter 'YES': ^CTraceback (most recent call last):
  File "/usr/bin/corelight-client", line 197, in <module>
    client.resource.process(session, resource)
  File "/usr/local/python38/lib/python3.8/site-packages/client/resource.py", line 250, in process
    _processResponse(session, resource, response, schema, cache, data)
  File "/usr/local/python38/lib/python3.8/site-packages/client/resource.py", line 334, in _processResponse
    if sys.stdin.readline() != "YES\n":
KeyboardInterrupt

With this change it feels a bit more pleasant:

$ corelight-client smartpcap storage shutdown

== Confirmation required ==

This will shutdown Smart PCAP external storage, which requires sensor reboot to resume the capture function.

== To proceed, enter 'YES': ^C
== Aborted

[szaydel]

Wow, this took a while @perkinjo . I forgot all about this PR. :)

Thank you, Sam.