OO-2172: refactor the spring configuration to be more Spring 4 friendly, remove the cycle generate by the properties injection, deployment of course and user in a separate module

no-jira: fix some unicode characters, better length check in velocity template, add some infos for user properties context

OO-2288: clean up the reference of the test if the course is corrupt, if the course node doesn't exist in run structure and in editor model

OO-2201: allow author to batch configure the groups in their owned courses (and user with group management right in the course)

OO-2277: show an error message instead of a red screen if the QTI 2.1 preview cannot rendered the assessment item