added automated users role to xqueue playbook

playbooks/edx-east/xqueue.yml

@@ -28,6 +28,8 @@
       when: elb_pre_post
   roles:
     - aws
+    - role: automated
+      AUTOMATED_USERS: "{{ XQUEUE_AUTOMATED_USERS | default({}) }}"
     - role: nginx
       nginx_sites:
       - xqueue