adding gh_users for setting up login

playbooks/edx-east/edx_provision.yml

@@ -17,6 +17,7 @@
   hosts: launched
   sudo: True
   gather_facts: True
-  tasks:
-    - debug: msg="test"
-
+  roles:
+    # gh_users hash must be passed
+    # in as a -e variable
+    - gh_users