Use play instead of role.

playbooks/edx-east/deployer.yml

@@ -2,14 +2,14 @@
 # You will need to create a gh_users.yml that contains the github names of users that should have login access to the machines.
 # Setup user login on the bastion
 - name: Configure Bastion
-  hosts: tag_role_bastion
+  hosts: tag_play_bastion
   sudo: True
   gather_facts: False
   roles:
   - user
 # Configure an admin instance with jenkins and asgard.
 - name: Configure instance(s)
-  hosts: tag_role_admin
+  hosts: tag_play_admin
   sudo: True
   gather_facts: True
   roles: