FXOLAT-243: backport the clean-up of third party libraries to OpenOLAT (remove HSQLDB from WAR, cluster libs if not wanted...)

FXOLAT-309: reactivate the calendar tests, make the test of repository manager more reliable, add more close hibernate session in the different threads which are create in unit tests

FXOLAT-296	: enhanced REST API for users, add flag to send the portrait as attribute with Base64 encoding

FXOLAT-296	: enhanced REST API for notifications (by type), better unit tests this function, optimize the way to get notifications by type in the controller

--HG--
branch : FXOLAT-282-virtualclassroom

--HG--
branch : FXOLAT-306 adaptions to olat for moodleconverter

FXOLAT-282: fix some issues: resource not found in admin, edit button in edit panel, missing i18n key

--HG--
branch : FXOLAT-282-virtualclassroom

FXOLAT-207: fix a unit test which is dependent for the order of a returned list which is DB specific