OO-984: add media mapper for description, objectives, credits, requirements, refactor long to int conversion in quota, remove some used parameters for the rich text element

no-jira: backport fix for the escaping of already escaped characters by TinyMCE in enrollment course element

OO-716 fix wrong response info initialization, problem when no user data is available, added resource infos, GUI beautify and print optimization

OO-1047: let the single choice override the maxvalue if necessary, set the 0 score in the Java Object for the editor instead of the default value 1

no-jira: fix unit test of the  courses REST API with PostgreSQL, order of the courses is not defined

OO-1042: check the boundaries of the hibernate bag before add a checkpoint, clean the velocity container and reload all data after a save...

OO-1038: better check of long without exception, try and catch in PersistingCourseGroupManager, unit tests