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

OO-111: update business path in e-portfolio, improve back suppport, reenable full text search with jump to the right menu item in home, enable jump from notifications to the right menu item in home... refactor slightly the ContextEntry to enable rewrite of the business path before the jump

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branch : bps