PLAT-1499 Use appropriate default settings in Docker devstack

cms/envs/devstack_with_worker.py

@@ -11,10 +11,15 @@ In two separate processes on devstack:
     ./manage.py cms celery worker --settings=devstack_with_worker
 """
 
+import os
+
 # We intentionally define lots of variables that aren't used, and
 # want to import all variables from base settings files
 # pylint: disable=wildcard-import, unused-wildcard-import
-from cms.envs.devstack import *
+if 'BOK_CHOY_HOSTNAME' in os.environ:
+    from cms.envs.devstack_docker import *
+else:
+    from cms.envs.devstack import *
 
 # Require a separate celery worker
 CELERY_ALWAYS_EAGER = False