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'
Merge remote-tracking branch 'gooru/master'
Merge remote-tracking branch 'goorus/master'
Merge branch 'master' of https://github.com/cyrilraja/Gooru-Core-API
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
Made Changes pertaining to task DO-5232
Merge pull request #507 from saravanab/master

Made Changes pertaining to task DO-5232
Merge remote-tracking branch 'goorus/master'
Column family custom_fields_group added
Merge pull request #508 from rishwanthavr/master

Column family custom_fields_group added
Merge remote-tracking branch 'gooru/master'
Added Support to Task CORE-1403([Authority] Need to use appropriate entity operation in APIs).