OO-407: more admin informations, popup to create a room, implements more exception to be user friendly if the server is not available

OO-406: implements the skeleton for the OpenMeetings rooms, course building blocks, group tools, connection via SOAP to OpenMeetings...

Merge OpenOLAT default branch to OO377 development branch with ebb75f92613e81449df0fff520426f017b27b33c

OO-288: fix security issue with GET repo/courses/courseId/groups, add informations about olatResource in RepositoryEntryVO

OO-377: implements pending state or reservation for groups and repository entry access to participants

OO-390: only increments the attempts on the first finished SCO if the SCORM content has multiple SCOs

OO-363 OO-371 Fix stale blog entry error when editing from old cached item, incorrect items in navigation, navigation styles

OO-388 OO-371 Show correct logged in user count also without IM, remove AJAX icon which clutters the UI

OO-354: enhance the pom.xml to run the unit tests on Oracle, update the TESTING.README.LATEST with tips about Oracle

OO-302: add RESt API methods to manage the members of a repository entry, fix an issue with the calendar API, fix an unreliable unit test in UserTest by Oracle, add calendar API tests to the OpenOLAT suite