call setupCoreSessions in test setup, fixes AttributeError: session_data_manager in plone.multilingual.subscriber.createdEvent, refs #8364
fixed workflow action, refs #8364
put robot suite on test level 2
added script add_user_and_send_notifications and transition revoke_phase_1 to workflow, refs #8364
moved workflow script to the right position but deactivated it as it breaks the tests, refs #8364