CAL-861 Implement new Calendar REST API
Quick fix for Hibernate transaction log in unit test
Refine the unit tests
Implement Calendar REST API
Check permission to view, update, delete calendar by id
CAL-861 create DAO for Calendar invitations
CAL-861 improve DAO object for calendar invitations
CAL-861 fix small bug on MultiListAccess
User current idendity to check user in group
Get, Update, Delete Event by Id
CAL-861 use InvitationResource instead of use the Invitation class directly in rest-api