Fix #6417: users with group permission should be able to create groups via API
Created by: jirutka
This is updated and slightly modified patch from #7529 that fixes #6417 (closed).
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: jirutka
This is updated and slightly modified patch from #7529 that fixes #6417 (closed).