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-1691: add an option tp specify the port of the smtp host, add an additional optional for start tls to trust the host

OO-1695: for assignment and submission due date, remove the hour and minute if date only, minus one day ( meaning: user has the whole day to do the task ), for solution remove only hour and minute if date only ( meaning the solution appears at the date exactly )