OO-4080: Possibility to use a rubric (evaluation form) to calculate the score of the manual scoring course node

OO-2967: refactor the list of assessed identities in assessment tools to be delivered by the resource or the course element them self

OO-2897: implement last modification per user role (as participant or as coach), aggregate the values on structure nodes

OO-2790: add the options to upload assessment documents on a per course element / user base which behave like the user comment

OO-1593: implements several strategies for the state "failed", implements done in assessment tool, checklist and group task...

OO-1593: return more informations on score evalutation, add a specific persistent assessable course node, fix selenium tests and unit tests

OO-911, OO-912: implements the course node triggered buttons in assessment tool, implement bulk upload for tasks with selection of a group if needed

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

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branch : bps