make change in upgrader (12.x admin become administrator, sysadmin adn
roles manager, 12.x user manager become user managers and roles
managers)

OO-3128: replace the select * for update with a simple update statement to update the status and visibility in chat preferences

OO-1443: upgrade JUnit ( long overdue ), remove deprecated junit.* packages, fix some issues with order dependent tests, fix an issue with empty ClusterDoInSync

OO-1228: reduce sleep time in unit tests, update undertow, remove some translator error in course wizard, make that the unit tests for the identity power search really test and fail if something goes wrong...

OO-449: implements notifications for private message, download of log in course and group, archive of log by course deletion...

OO-449: first part of the implementation: remove smack libraries, refactor controller and unify them, implements messaging across the OpenOLAT event bus, implements administration part to enable chat...