Ensure correct tmp ownership for Gnocchi

Directory /var/lib/gnocchi/tmp is created by gnocchi-upgrade
with root ownership. This patch ensures the directory is created
first with proper ownership.

Closes-Bug: #1799522
Change-Id: Iaf8e13490adffaf4a606730f4758d064af69b2aa

docker/services/gnocchi-api.yaml

@@ -132,6 +132,14 @@ outputs:
                     USER: {get_param: CephClientUserName}
               owner: gnocchi:gnocchi
               perm: '0600'
+            - path:
+                list_join:
+                  - "/"
+                  - - {get_param: GnocchiFileBasePath}
+                    - "tmp"
+              owner: gnocchi:gnocchi
+              perm: '0600'
+              recurse: true
         /var/lib/kolla/config_files/gnocchi_db_sync.json:
           command:
             str_replace:

releasenotes/notes/gnocchi-tmp-b5b48708c5dd17df.yaml

@@ -0,0 +1,8 @@
+---
+
+fixes:
+  - |
+    Directory /var/lib/gnocchi/tmp is created by gnocchi-upgrade with root
+    ownership. It is now ensured that the directory is created before upgrade
+    with proper ownership. For details see:
+    https://bugs.launchpad.net/tripleo/+bug/1799522