Added Support to CORE-1307(Require Page Start and Page End Parameters in get collection API for PDF resources).
Merge remote-tracking branch 'gooru/master'

Conflicts:
	gooru-
core/src/main/java/org/ednovo/gooru/core/constant/ConstantProperties.java
Merge pull request #384 from PurnimaGS/master

Rover-126 Implemented code for Google Oauth login
[Library&Folders] Show proper error message improvements
Excluded null values in object
Merge pull request #385 from skpcharles/master

Library&Folders] Show proper error message improvements
Added Support to Jira Task CORE-1331(Send Email Invite for Open classes).
included other meta attributes while fetching the concept object
Merge pull request #387 from sheebans/master

included other meta attributes while fetching the concept object
Implemented async clear cache  support  while  doing CUD operation to the object
Merge pull request #388 from sheebans/master

Implemented async clear cache  support  while  doing CUD operation to the object
Merge remote-tracking branch 'gooru/master'
Excluded Resource_info object from CollectionItemFields.
Changed dynamically computing the rating score logic
Provided  pagination support for user & profile
[User & Profile] Added expiring time for cache
Merge pull request #386 from saravanab/master

Added Support to Jira Task CORE-1331(Send Email Invite for Open classes)
Fixed code and query releated issues in collectionRepository hibernate
Merge pull request #390 from sheebans/master

Fixed code and query releated issues in collectionRepository hibernate
Fixed code related issues and moved static queries as constant in userRepository hibernate