Merge remote-tracking branch 'gooru/master'
core-1610 Added api call for LTI Launch
Merge pull request #571 from skpcharles/master

More changes on  collection duplicate issue
Merge pull request #572 from PurnimaGS/master

core-1610 Added api call for LTI Launch
CORE-1612 - Add Support to throw appropriate status when content not found
Merge remote-tracking branch 'gooru/master'
* Fixed DO-5479 On deletion of reviews the # reviews is not reflecting the change
CORE-1612 - Add Support to throw appropriate status when content not found
Merge pull request #574 from rishwanthavr/master

CORE-1612 - Add Support to throw appropriate status when content not found
Merge remote-tracking branch 'gooru/master'
*fixed code block indentation
Content.hbm.xml - cluster_uid, is_representative fields added in resource
Merge pull request #575 from cyrilraja/master

* Fixed DO-5479 On deletion of reviews the # reviews is not reflecting t...
Merge pull request #576 from rishwanthavr/master

Content.hbm.xml - cluster_uid, is_representative fields added in resourc...
changed the resourcetype for shelf