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: If6394558b373f85e61840f538a3e2e1105cfe98c
Closes-Bug: #1755102

manifests/db/sync.pp

@@ -41,5 +41,6 @@ class ironic::db::sync(
     ],
     notify      => Anchor['ironic::dbsync::end'],
     require     => File['/var/log/ironic/ironic-dbsync.log'],
+    tag         => 'openstack-db',
   }
 }

manifests/inspector/db/sync.pp

@@ -18,5 +18,6 @@ class ironic::inspector::db::sync {
       Anchor['ironic-inspector::dbsync::begin']
     ],
     notify      => Anchor['ironic-inspector::dbsync::end'],
+    tag         => 'openstack-db',
   }
 }

releasenotes/notes/openstack_db_tag-92785ba5669c7b28.yaml

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

spec/classes/ironic_db_sync_spec.rb

@@ -17,6 +17,7 @@ describe 'ironic::db::sync' do
                          'Anchor[ironic::config::end]',
                          'Anchor[ironic::dbsync::begin]'],
         :notify      => 'Anchor[ironic::dbsync::end]',
+        :tag         => 'openstack-db',
       )
 
       is_expected.to contain_file('/var/log/ironic/ironic-dbsync.log').with(
@@ -44,6 +45,7 @@ describe 'ironic::db::sync' do
                              'Anchor[ironic::config::end]',
                              'Anchor[ironic::dbsync::begin]'],
             :notify      => 'Anchor[ironic::dbsync::end]',
+            :tag         => 'openstack-db',
         )
         }
     end

spec/classes/ironic_inspector_db_sync_spec.rb

@@ -10,7 +10,8 @@ describe 'ironic::inspector::db::sync' do
         :path        => '/usr/bin',
         :user        => 'ironic-inspector',
         :refreshonly => 'true',
-        :logoutput   => 'on_failure'
+        :logoutput   => 'on_failure',
+        :tag         => 'openstack-db',
       )
     end