OO-1867: upgrade selenium and arquillian libraries to support Firefox 46 and update the tests to work with them

OO-1770: remove the maven repository of codehaus, more unit tests for forum, hardened the closing of the info blue box, fix an issue with the blue box, fix an issue with AssessmentTest.bulkAssessment on PostgreSQL

OO-1615,OO-1616: remove dependency to Spring ORM, remove hook between OpenOLAT and Spring Transaction, make the dependency path to DB from LockManager clearer, refactor LockManager

OO-1645,OO-1595: refactor the personal configuration of calendars, the datamodel of imported calendars, make the description visible and editable...

OO-1655: update surefire and failsafe plugin, update configuration for arquillian, selenium and Tomcat 8

OO-1611: update pdfbox, springframework, hibernate, apache poi... exclude jgroups, bootstrap framework from .war

OO-1443: upgrade selenium to version 2.46 which is much quicker as 2.45 and fix an issue with Firefox 38, fix a race condition in the business gorup tree which make the links unusable, fix a upper/lower case issue if the selenium tests are run with PostgreSQL

OO-1525: update jquery to version 2.1.3, jquery UI to 1.11.4, make the insert line bigger, fix the double event drop events in Firefox

OO-1443: update ActiveMQ ( long overdue ), exclude library for Windows single-sign-on for PostgreSQL driver

OO-1443: upgrade JUnit ( long overdue ), remove deprecated junit.* packages, fix some issues with order dependent tests, fix an issue with empty ClusterDoInSync