replace celery task decorators with a kombu-based publisher

this commit implements the bulk of `awx-manage run_dispatcher`, a new
command that binds to RabbitMQ via kombu and balances messages across
a pool of workers that are similar to celeryd workers in spirit.
Specifically, this includes:

- a new decorator, `awx.main.dispatch.task`, which can be used to
  decorate functions or classes so that they can be designated as
  "Tasks"
- support for fanout/broadcast tasks (at this point in time, only
  `conf.Setting` memcached flushes use this functionality)
- support for job reaping
- support for success/failure hooks for job runs (i.e.,
  `handle_work_success` and `handle_work_error`)
- support for auto scaling worker pool that scale processes up and down
  on demand
- minimal support for RPC, such as status checks and pool recycle/reload

awx/main/utils/reload.py

@@ -11,11 +11,8 @@ from django.conf import settings
 logger = logging.getLogger('awx.main.utils.reload')
 
 
-def _supervisor_service_command(service_internal_names, command, communicate=True):
+def _supervisor_service_command(command, communicate=True):
     '''
-    Service internal name options:
-     - beat - celery - callback - channels - uwsgi - daphne
-     - fact - nginx
     example use pattern of supervisorctl:
     # supervisorctl restart tower-processes:receiver tower-processes:factcacher
     '''
@@ -25,13 +22,7 @@ def _supervisor_service_command(service_internal_names, command, communicate=Tru
     args = ['supervisorctl']
     if settings.DEBUG:
         args.extend(['-c', '/supervisor.conf'])
-    programs = []
-    name_translation_dict = settings.SERVICE_NAME_DICT
-    for n in service_internal_names:
-        if n in name_translation_dict:
-            programs.append('{}:{}'.format(group_name, name_translation_dict[n]))
-    args.extend([command])
-    args.extend(programs)
+    args.extend([command, '{}:*'.format(group_name)])
     logger.debug('Issuing command to {} services, args={}'.format(command, args))
     supervisor_process = subprocess.Popen(args, stdin=subprocess.PIPE,
                                           stdout=subprocess.PIPE, stderr=subprocess.PIPE)
@@ -48,6 +39,6 @@ def _supervisor_service_command(service_internal_names, command, communicate=Tru
         logger.info('Submitted supervisorctl {} command, not waiting for result'.format(command))
 
 
-def stop_local_services(service_internal_names, communicate=True):
-    logger.warn('Stopping services {} on this node in response to user action'.format(service_internal_names))
-    _supervisor_service_command(service_internal_names, command='stop', communicate=communicate)
+def stop_local_services(communicate=True):
+    logger.warn('Stopping services on this node in response to user action')
+    _supervisor_service_command(command='stop', communicate=communicate)