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: I0769f75d92e87d686387286041502261fad871e7
Closes-Bug: #1755102
(cherry picked from commit f5078648ea)

manifests/db/sync.pp

@@ -20,6 +20,7 @@ class mistral::db::sync {
       Anchor['mistral::dbsync::begin']
     ],
     notify      => Anchor['mistral::dbsync::end'],
+    tag         => 'openstack-db',
   }
 
   exec { 'mistral-db-populate':
@@ -35,6 +36,7 @@ class mistral::db::sync {
       Anchor['mistral::dbsync::begin']
     ],
     notify      => Anchor['mistral::dbsync::end'],
+    tag         => 'openstack-db',
   }
 
 }

releasenotes/notes/openstack_db_tag-a79c0b390eeba4bb.yaml

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

spec/classes/mistral_db_sync_spec.rb

@@ -13,7 +13,8 @@ describe 'mistral::db::sync' do
         :refreshonly => 'true',
         :try_sleep   => 5,
         :tries       => 10,
-        :logoutput   => 'on_failure'
+        :logoutput   => 'on_failure',
+        :tag         => 'openstack-db',
       )
 
       is_expected.to contain_exec('mistral-db-populate').with(
@@ -21,7 +22,8 @@ describe 'mistral::db::sync' do
         :path        => '/usr/bin',
         :user        => 'mistral',
         :refreshonly => 'true',
-        :logoutput   => 'on_failure'
+        :logoutput   => 'on_failure',
+        :tag         => 'openstack-db',
       )
 
     end