OO-645: only one identifier for the assessment tool's tables, show first name and last name as default

CL-220,OO-613: update search in repository tab to the new method, fix double optimization to retrieve the access control objects, fix the user name cache to prevent always searching non-existing usernames, fix RS in assessment tool caused by FULLY_PASSED property for Onyx

OO-613: unify Onyx QTI 2.1 tools with the OLAT QTI 1.2 tools to remove duplicate code, change the WebService stack for Onyx

OO-622,CL-225: remove username from GUI in place where is not really needed and students can see it. Mark others place with //TODO username where it need more works and/or the username is only visible by author/coach/admin... Additional fix the setup sql for MySQL (index too long).

OO-592: remove tx manager annotations scanner, move configurations in resources/serviceconfig to java/... where they are needed, use import instead of the *Context.xml which allow deployment on weblogic and some others small fixes

OO-586: import members by user names, emails and institutional numbers, remove select box, update wording

OO-592: break direct dependency to UserDataDeletable and DeletableGroupData interfaces, remove unused spring configuration files...

OO-449: show "do not disturb" status in the homepage, list of course members, list of groups members

OO-531: work on tooltip for link, CSS for tooltip, ajax tree replacement in e-portfolio, z-index in dialog, compressed javascripts, update jquery and jquery ui

OO-450 improve chat layout, imitating skype as best practice example. add link to user visiting card. change small portait image size to 30x30 to match icons available in default theme

OO-449 OO-448 OO-450 fixing configuration issues and dependencies in IM module, adding context help and translations, some GUI optimizations

OO-562: fix the difference between the profile editor and the home page about the visibility of mandatory attributes

OO-449: with the whole caching refactoring, make the HTTP session partially serializable without (too much) exceptions