OO-662: optimize the members view of course and group. I make three queries to prevent to attack with the o_bs_membership, and prevent a cross product

OO-662: better performance on login for large instance with these portlets on: courses for students, courses for teachers, groups

OO-631: fire events on JMS after committing the membership changes, add a direct event for enrollment to update the GUI in a synchronous manner

OO-623: add fields for managed groups and repository entries, add a lifecycle DB object, enhance the REST API to search with externalId/externalRef...

OO-592: break direct dependency to UserDataDeletable and DeletableGroupData interfaces, remove unused spring configuration files...

OO-449: remove all surviving @Transactional, add unit tests in groups to test them, add a missing view in IM, add unit tests to check it...

OO-543: add a mail meta ID for every mail package, so the batch of e-mails appear as only one e-mail in the outbox of OpenOLAT

OO-538: unify our implementation to retrieve entity managers with spring, remove wrapper classes to acesss directly transaction and entity manager, don't cache them anymore in our code, @Transactional fully functional, add some sleep in unit tests to wait from the new asynchronous multi user events

OO-377: map the reservations to the right roles, upgrade waiting list after a cancellation, better choice of templates, fix remove of reservations as coach/admin

OO-449: first part of the implementation: remove smack libraries, refactor controller and unify them, implements messaging across the OpenOLAT event bus, implements administration part to enable chat...

OO-399: fix a backwards compatibility check in the mail course building block, fix the query for the fallback based on group names

OO-377: implements pending state or reservation for groups and repository entry access to participants

OO-373: made the notifications manager robust under concurrent access, write more unit tests to tests the queries on the database and test it under concurrent load

OO-291: update the bulk changes / user import ... to use the new methods of the business group service

OO-291: remove doInSync in BusinessGroupService and use pessimistic locking directly on the BusinessGroup

OO-291: optimize synching with instant messaging in the case of batch update, fix rights for the lin links statistics and course db in course...