Merge pull request #693 from edx/han/playbooks/roles/xqueue/defaults

Changed var to $XQUEUE_DJANGO_USER in testing older var did not work

playbooks/roles/xqueue/defaults/main.yml

@@ -61,7 +61,7 @@ xqueue_auth_config:
   AWS_ACCESS_KEY_ID:  $XQUEUE_AWS_ACCESS_KEY_ID
   AWS_SECRET_ACCESS_KEY: $XQUEUE_AWS_SECRET_ACCESS_KEY
   REQUESTS_BASIC_AUTH: [$XQUEUE_BASIC_AUTH_USER, $XQUEUE_BASIC_AUTH_PASSWORD]
-  USERS: "{{ XQUEUE_DJANGO_USERS }}"
+  USERS: $XQUEUE_DJANGO_USERS
   DATABASES:
     default:
       ENGINE: "django.db.backends.mysql"