Add review and etherpad to backup group

We should probably back these up.

Change-Id: I1e174273faefacea98ebece7a90a1baf93d52245

inventory/groups.yaml

@@ -21,6 +21,8 @@ groups:
 # setup on the server(s).  You can submit a follow-on change to revert
 # this at the same time.
   backup:
+    - etherpad[0-9]*.opendev.org
+    - review[0-9]*.openstack.org
     - review-dev[0-9]*.open*.org
 #  backup-server:
 #    - backup[0-9]*.opendev.org

playbooks/roles/install-ansible/files/inventory_plugins/test-fixtures/results.yaml

@@ -50,6 +50,7 @@ results:
     - puppet4
 
   review01.openstack.org:
+    - backup
     - gerrit
     - letsencrypt
     - review