fix tests after CT release #140
Description
- test_create_edit_delete_calendar_appointment (None Type Response) #141
- test_create_and_delete_group
- Implement new TAG behaviour #142
- test_create_edit_delete_song / test_get_song_ajax /test_create_edit_delete_song_arrangement
- test_file_upload_replace_delete (likely modified sample data in CT
- test_create_and_delete_group (likely simultaneous aborted test which are not auto cleaned)