OO-2479: reduce overhead everywhere, optimized and simplified query to count the participants of a group, bypass reloading the group set of identities, bypass reloading the base group of business group...

OO-2429: move the foreign key from identity to user, remove double mapping of identity, add more unit tests for invitation, unify the methods to create the user and identity

OO-2172: refactor the spring configuration to be more Spring 4 friendly, remove the cycle generate by the properties injection, deployment of course and user in a separate module

OO-2041: upgrade hibernate and infinispan, update mapping to use TableGenerator with legacy-hilo optimizer

OO-1616: replace the view for the business group lists with several customized queries which load only the needed data

OO-1616: used named query for some queries which are often used, get user course infos with the resource ( hitting the foreign key directly )

OO-1635,OO-722: refactor the ajax by iframe to use XHR, push the current business path to the browser via HTML5 push state, implements back button support via HTML5 History API...

OO-1536: inline the user's visiting card in the different member list, add a tool in the list as in author list, add close button for the visinting card (if opened in the main window), add close button to the business groups tabs

OO-1436: fix an issue with a method's signature, log audit creation of identity and authentication, show errors after import of users...

OO-1424: remove subscriptions if a member is removed from a group or a course, or a group is removed from the relations to a course

OO-1391: replace the search by userProperties map in User by an "exists" using a new and  	independent mapping of user property.