Run nova_statedir_owner on every run

So far nova_statedir_owner step is only run on initial deploy or
when the image changes. This runs it on every deploy/scale/...
run.

Related-Bug: 1814260

Change-Id: I5eaaad9371183dff070d0eb72457fb76a6a60ebe
(cherry picked from commit efaf0c3bea)

docker/services/nova-compute.yaml

@@ -80,6 +80,12 @@ parameters:
                  This setup requires the Compute role to have the
                  PacemakerRemote service added to it.
     type: boolean
+  DeployIdentifier:
+    default: ''
+    type: string
+    description: >
+      Setting this to a unique value will re-run any deployment tasks which
+      perform configuration on a Heat stack-update.
 
 resources:
 
@@ -194,6 +200,13 @@ outputs:
               - /var/lib/nova:/var/lib/nova:shared
               - /var/lib/docker-config-scripts/:/docker-config-scripts/
             command: "/docker-config-scripts/nova_statedir_ownership.py"
+            environment:
+              # NOTE: this should force this container to re-run on each
+              # update (scale-out, etc.)
+              - list_join:
+                  - ''
+                  - - 'TRIPLEO_DEPLOY_IDENTIFIER='
+                    - {get_param: DeployIdentifier}
         step_4:
           nova_wait_for_placement_service:
             start_order: 2