*Revert changes on CORE-1543
Merge remote-tracking branch 'gooru/master'
Merge remote-tracking branch 'gooru/master'
Merge pull request #590 from PurnimaGS/master

Core-1628 Google drive issue fixed
added fix for getcollectionlist 504 issue
Merge pull request #591 from skpcharles/master

added fix for getcollectionlist 504 issue
Fixed scollection re-index issue in update views count
Merge branch 'master' of https://github.com/Gooru/Gooru-Core-API
more changes on content meta association
Merge remote-tracking branch 'gooru/master'
*added exception in logs for throwing session attempt try
Merge pull request #592 from cyrilraja/master

*throwing exception added in logs for session attempt try
added validation for invalid file in media API
Merge remote-tracking branch 'gooru/master'
Merge pull request #593 from skpcharles/master

added validation for invalid file in media API
Implemented few more Changes to CORE-1236
Merge pull request #594 from saravanab/master

Implemented few more Changes to CORE-1236
Added fix for scollection re-index throws null pointer
Method to get upper bounds in a collection
Merge pull request #596 from RenukaGurumurthy/master

Added methods to get upper bounds in a collection