OO-1616: used named query for some queries which are often used, get user course infos with the resource ( hitting the foreign key directly )

OO-1616: reduce the number of double call to the repository entry with the manager and after with the course

OO-1709: set current course version to 10, default recertification timelapse is 0, check if the value is an integer before casting

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-1706: allow bulk download of individual tasks with only assignment or submission, rename the directory of the downloaded archive for individual tasks

OO-1635: implement enAttemptInteraction, integrate submit within flexi form and use FormSubmit, rneder test entry...

OO-1635: replace xslt rendering engine by an hybrid java / velocity rendering engine with integrate with our flexi from framework