OO-418: add a workaround to the importer in one step which prevents to finish several time the course import

OO-407: implements a DAO with its own database table instead of o_property, implements download of recording, scaling of the recording, wording...

OO-419: add a unit test to check if the velocity templates are parseable, remove some unused templates, fix the auto-completion in french

Merge: fix the unit LockTest and make easier to find a spring configuration error with it, update arquillian deployer

Merge: fix the unit tests, remove mocked startup of OpenOLAT for the last 2 unit tests which need it, fix mysql index which are too long in setupDatabase.sql

OO-422: new layout for the administration tree, break the "system infromations" tabbed panel in single controllers under a main menu point, add a new system informations controller with some VIP values

OO-422: first step of the rearrangement of the administration site, breaks the system informations in multiple menu points, rewrite some controllers in a more modern way

OO-271: refactor the user session management, move the the logic in its own manager, persist the time out values, make the admin GUI a bit better

OO-324: the list of course nodes is made on the fly, and check every time if a course building block is enabled or not, remove the flag for the vitero course building block