OO-1761: more fix to the copy of course element within a course, copy or import of a course with a project broker element

OO-848: extended postCopy() method with source and target Course to get the copy of a whole course working

OO-848: enhance the interface of course nodes to do a post copy processing different from the import one

OO-1152: implemented export/importNode methods to add the project data to the exportprocess of the projectbroker

OO-990: rework importation of course node with references, implement autowiring capabilities in controllers

OO-936: implements course element "check list", enhance the flexi-table with sort, filter and export, enhance publish process with an update step, upgrade pdfbox to version 1.84

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

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branch : bps