redis socket support

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

@@ -10,18 +10,6 @@ DATABASES = {
     }
 }
 
-BROKER_URL = 'redis://{}:{}/'.format(
-    "{{ redis_hostname }}",
-    "{{ redis_port }}",)
-
-CHANNEL_LAYERS = {
-    'default': {'BACKEND': 'channels_redis.core.RedisChannelLayer',
-                'CONFIG': {
-                    'hosts': [("{{ redis_hostname }}", {{ redis_port|int }})],
-                    'capacity': 10000,
-                 }}
-}
-
 CACHES = {
     'default': {
         'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',