added fix for StaleStateException for delete collection
Merge pull request #720 from sheebans/master

added fix for StaleStateException for delete collection
Implemented V2 role management API
Merge branch 'master' of https://github.com/Gooru/Gooru-Core-API
API call fixed the string length >15
Merge pull request #721 from viji-m/master

Added limit validation for user-name in create user API
Merge remote-tracking branch 'gooru/master'
Altered indentation in null pointer.