fully message driven job execution

TODO:
* Need a distributed lock (leverage postgres)
* Less memory-intensive graph representation
* Maybe serializer/deserializer graph to database
  * Iterative graph building instead of full rebuild.

awx/settings/defaults.py

@@ -360,7 +360,7 @@ CELERY_ROUTES = ({'awx.main.tasks.run_job': {'queue': 'jobs',
                                                               'routing_key': 'scheduler.job.launch'},
                   'awx.main.scheduler.tasks.run_job_complete': {'queue': 'scheduler',
                                                                 'routing_key': 'scheduler.job.complete'},})
-
+                  
 CELERYBEAT_SCHEDULE = {
     'tower_scheduler': {
         'task': 'awx.main.tasks.tower_periodic_scheduler',