*Fixed deleting only the resource as collection item for tag
Merge remote-tracking branch 'gooru/master'
Merge pull request #432 from parthibane/master

Added support to save content statistics data to cassandra - CORE-137
Merge remote-tracking branch 'gooru/master'
*Fixed item.rate event log issue
Merge pull request #434 from parthibane/master

Added support to call re-index  call in update stats api
Merge pull request #435 from parthibane/master

Fixed values not insterted in cassandra issue
Code improvemets in assessment Service Impl
Merge remote-tracking branch 'goorus/master'
Code improvements in inviteuser
Merge pull request #433 from cyrilraja/master

Fixed item.rate event log issue
Merge pull request #436 from vksvenkat/master

Code improvements and removed un used codes
Reviewed feedback repository and did the code related changes.
Feedback repository code related fixes
Merge pull request #437 from sheebans/master

Reviewed feedback repository and did the code related changes.
Reviewed CustomTableRepositopryHibernate and fixed code related issues
Merge pull request #438 from sheebans/master

Reviewed CustomTableRepositopryHibernate and fixed code related issues
Reviewed event repository and fixed code related issues and method does not pagination
Merge pull request #439 from sheebans/master

Reviewed event repository and fixed code related issues and method does not pagination
added constants in ConstantsPropereties