Add 'openstack-db' tag to db-sync Exec resource

In order to make easy orchestration on all OpenStack db-sync, add this
tag so people can use this tag in composition layer.
A use case it to set some orchestration to make sure MySQL Galera is
ready before running any Exec with this tag.

Change-Id: Ic7eeccc651d8b9f8c7884e6cfc765c3d4adb650c
Closes-Bug: #1755102
(cherry picked from commit 75732ff4e3)

manifests/db/sync.pp

@@ -20,6 +20,7 @@ class murano::db::sync {
       Anchor['murano::dbsync::begin']
     ],
     notify      => Anchor['murano::dbsync::end'],
+    tag         => 'openstack-db',
   }
 
 }

manifests/db/sync_cfapi.pp

@@ -20,6 +20,7 @@ class murano::db::sync_cfapi {
       Anchor['murano::dbsync::begin']
     ],
     notify      => Anchor['murano::dbsync::end'],
+    tag         => 'openstack-db',
   }
 
 }

releasenotes/notes/openstack_db_tag-809258d24c1d3b46.yaml

@@ -0,0 +1,3 @@
+---
+features:
+  - Add openstack-db tag to Exec that run db-sync.

spec/classes/murano_db_sync_cfapi_spec.rb

@@ -15,6 +15,7 @@ describe 'murano::db::sync_cfapi' do
                          'Anchor[murano::config::end]',
                          'Anchor[murano::dbsync::begin]'],
         :notify      => 'Anchor[murano::dbsync::end]',
+        :tag         => 'openstack-db',
       )
     end
 

spec/classes/murano_db_sync_spec.rb

@@ -17,6 +17,7 @@ describe 'murano::db::sync' do
                          'Anchor[murano::config::end]',
                          'Anchor[murano::dbsync::begin]'],
         :notify      => 'Anchor[murano::dbsync::end]',
+        :tag         => 'openstack-db',
       )
     end