replace rabbitmq with redis

* local awx docker-compose and image build only.

installer/roles/local_docker/templates/credentials.py.j2

@@ -10,17 +10,13 @@ DATABASES = {
     }
 }
 
-BROKER_URL = 'amqp://{}:{}@{}:{}/{}'.format(
-    "{{ rabbitmq_user }}",
-    "{{ rabbitmq_password }}",
-    "{{ rabbitmq_hostname | default('rabbitmq')}}",
-    "{{ rabbitmq_port }}",
-    "{{ rabbitmq_default_vhost }}")
+BROKER_URL = 'redis://{}:{}/'.format(
+    "{{ redis_hostname }}",
+    "{{ redis_port }}",)
 
 CHANNEL_LAYERS = {
-    'default': {'BACKEND': 'asgi_amqp.AMQPChannelLayer',
-                'ROUTING': 'awx.main.routing.channel_routing',
-                'CONFIG': {'url': BROKER_URL}}
+    'default': {'BACKEND': 'awx.main.channels.RedisGroupBroadcastChannelLayer',
+                'CONFIG': {'hosts': [("{{ redis_hostname }}", {{ redis_port|int }})]}}
 }
 
 CACHES = {