Merge pull request #279 from edx/carsongee/forum_test_fix

Forum role port test now properly uses host argument

playbooks/roles/forum/tasks/test.yml

 ---
 
 - name: forum | test that the required service are listening
-  wait_for: port={{ item.port }} timeout=10
+  wait_for: port={{ item.port }} host={{ item.host }} timeout=10
   with_items: "{{ forum_services }}"
   tags:
   - forum