OO-834: delegate the search to a pool to contains the Lucene bag habit to use ThreadLocals, update Lucene to 4.5.1

OO-831: iterate through subscriptions with a page query, remove the 2 StringBuilder which collect the audit log

OO-822: add recurrent events in full calendar, add translation in date picker (patch S. Clemenz + moving translation key to date picker, don't duplicate code from ICAlCalendarManager but move the methods to CalendarUtils)

OO-809: fix the wrong equals for non-mysql database in findIdentiesByEmail (patch 1 of S. Clemenz), add unit tests

CL-232: allow creation of course with title, shortTitle and RepositoryEntry displayName as parameters

CL-232: add the possibility to set the access/membersOnly flag in REST API (create course with parameters)

OO-816 fix wrong usage of periodic executor, was never stopped and caused o2c=1 side effects randomly when a tiny editor was displayed