Support for MongoDB

[lalu121212]

Hi,

I am testing dbstress with MongodDB and its failing after connection established:
10:43:46.496 [INFO] All database connections initialized, proceeding to the query execution phase
unity.parser.ParseException: Encountered " "(" "( "" at line 1, column 14.
Was expecting:
";" ...

10:43:46.622 [WARN] Query execution failed: Parse Exception: unity.parser.ParseException: Encountered " "(" "( "" at line 1, column 14.
Was expecting:
";" ...
Input query: db.test.count();

And the yaml file is as below:
unit_name: "unit1"
description: Example of a successful unit # optional
query: db.test.count()
uri: "jdbc:mongo://127.0.0.1:27017/admin"
username: user1
password: "pass1" # optional if provided on command line
parallel_connections: 1
repeats: 1
connection_timeout: 30000 # in ms, optional

Thank you.