Merge branch 'release/2.2.1' into develop
[DSI Releaser] prepare for next development iteration
Fixed npes on some isMember() implementations.
Removed ugly fix to allow coordinators to access execution course files, since it started to influence the members list used to send emails. Coordinators will loose access to course files by this very very ugly piece of code
Ensure all new group serializations write the new group bridge version
Fixed deletes of all entities related to the new groups, also implemented gc mechanism for new groups
Fixed places where code depended on specific instances of old Group that do not work with the translated version
Bug fix on isMember of AcademicOperationGroup
Fixed presentation name for UnitGroups
[DSI Releaser] prepare release v2.2.2
Merge branch 'release/2.2.2'