Expose projects_config parameter in review/review_dev classes

The value for that parameter is hardcoded in a nested class,
it should be defined in the outer class to allow user defined
value.

Change-Id: I1715d6a6cff52b9cc224e360104ef9438b6dcf30
Closes-Bug: 1388144
Merge "Expose projects_config parameter in review/review_dev classes"