Add ephemeral Heat entry to clouds.yaml

Adds an external_deploy_tasks to the ephemeral heat service used during
the undercloud install so that clouds.yaml gets configured with a cloud
config that can be used with ephemeral Heat. When configured, it can be
used as:

OS_CLOUD=heat openstack stack list

Depends-On: Id9992ee242d381c02cb530838fef21e60d10dfa6
Change-Id: I18900708cc7f667443b68690e47f97a1f49faa68
Signed-off-by: James Slagle <jslagle@redhat.com>

deployment/heat/heat-ephemeral-container-ansible.yaml

@@ -78,6 +78,28 @@ outputs:
               vars:
                 container_image: {get_param: ContainerHeatApiImage}
                 container_image_latest: "localhost/tripleo/openstack-heat-api:ephemeral"
+      external_deploy_tasks:
+        - name: Manage clouds.yaml file for ephemeral Heat
+          when:
+            - step|int == 1
+            - not ansible_check_mode|bool
+          block:
+            - name: Create /etc/openstack directory if it does not exist
+              become: true
+              file:
+                mode: '0755'
+                owner: root
+                path: /etc/openstack
+                state: directory
+            - name: Configure /etc/openstack/clouds.yaml for ephemeral Heat
+              include_role:
+                name: tripleo_keystone_resources
+                tasks_from: clouds
+              vars:
+                tripleo_keystone_resources_cloud_name: heat
+                tripleo_keystone_resources_cloud_config:
+                  auth_type: none
+                  endpoint: http://127.0.0.1:8006/v1/admin
       upgrade_tasks:
         - name: Convert to Ephemeral Heat
           when: