OO-852: implements the new bulk assessment wizard, move the task executor and scheduler in the services package

CL-232: in RESTAPI updated node are not set as dirty, course without changes are published and are in a rare status, access are resetted by publish

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).

no-jira: in repository details, open the editor of course the same way it will opened from the course (with breadcrumbs)

OO-347: add CSS class for details of a repository entry and more log by deployment of courses via the REST API

OO-530: replace HashMap with ConcurrentHashMap in some critical places where multi threading is an issue

OO-457: refactor tmp folder in OpenOLAT, use the java.io.tmpdir for all temporary files, configuration for absolute path for the indexer, fix deletion of temporary files in some archives, move qtieditor from tmp

OO-449: implements notifications for private message, download of log in course and group, archive of log by course deletion...

OO-213: make OpenOLAT more robust against corrupted course, mark them in details view, make home resistant to corrupted courses, give the possibility to delete them

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branch : 80-patch

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branch : bps

OLAT-6297 don't put empty course to cache

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branch : uzhFixes711