Import consumers after AppRegistry is populated in tutorial step 2. (#2068)

Author: danleyb2

docs/tutorial/part_2.rst

@@ -263,14 +263,12 @@ The next step is to point the main ASGI configuration at the
     from channels.security.websocket import AllowedHostsOriginValidator
     from django.core.asgi import get_asgi_application
 
-    from chat.routing import websocket_urlpatterns
-
     os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
     # Initialize Django ASGI application early to ensure the AppRegistry
     # is populated before importing code that may import ORM models.
     django_asgi_app = get_asgi_application()
 
-    import chat.routing
+    from chat.routing import websocket_urlpatterns
 
     application = ProtocolTypeRouter(
         {