OO-1757: replace the simple parser used to tokenize the Authorization header by the one of Tomcat which is RFC compliant

OO-1754: prevent sorting columns which are flagged as not sortable, add a dummy compare method to the static column instead of the AssertException

OO-1747: show a message if someone try the self registration on a system where it is disabled instead of a red screen, beautify the error and warning panel

OO-1744: queue the changes to the assessed identities list and make the changes with set instead of add/remove to hardened the list against changes coming from the user events and from JMS event

OO-1733: clean up all possible references, the check to prevent deletion must happen before reaching the delete method of the service

OO-1719: route properly the /url/CatalogEntry/2354 to the catalog if enabled and allowed for the user, or to "My courses > Catalog"