added final and removed unused codes
Merge remote-tracking branch 'goorus/master'
Changed coding exceptions for ServiceImpl
Merge remote-tracking branch 'goorus/master'
Merge remote-tracking branch 'gooru/master'
Made Changes pertaining to task DO-5232(6.5.c Parallel [System] reset password link does not work at Parents confirmation email).
Merge remote-tracking branch 'gooru/master'
Merge remote-tracking branch 'goorus/master'
Merge branch 'master' of https://github.com/cyrilraja/Gooru-Core-API
Merge pull request #501 from saravanab/master

Made Changes pertaining to task DO-5232(6.5.c Parallel [System] reset pa...
Merge pull request #503 from RenukaGurumurthy/master

Added Google Guava dependency
Merge remote-tracking branch 'gooru/master'
removed default level in get concept method
Merge pull request #504 from skpcharles/master

removed default level in get concept method
Improved index queue support
Merge remote-tracking branch 'gooru/master'
Merge pull request #505 from parthibane/master

Improved index queue support
Merge remote-tracking branch 'gooru/master'
*Implemented CORE-1511 API Tweak required in Get Active Members for Class API
Merge pull request #506 from cyrilraja/master

CORE-1511 API Tweak required in Get Active Members for Class API