Merge pull request #17 from skpcharles/master

Implemented mail support for invite user class
Merge pull request #18 from skpcharles/master

Committed missed changes
Implemented class memeber auto suggest mail ids
Merge pull request #19 from sheebans/master

Implemented class memeber auto suggest mail ids
Implemented CORE-521 Add a support for re-index through kafka.
improvements on create class