Change default port for MDNS service to 53

Due to PowerDNS restrictions the service can't resolve
domain name from DNS server on port other than 53.

Change-Id: I1ff12f99cf7e9dbfa4a2b737ba72950e9d88eefa
Related-Bug: https://mirantis.jira.com/browse/PROD-14930
diff --git a/classes/cluster/virtual-mcp-ocata-dvr/openstack/control.yml b/classes/cluster/virtual-mcp-ocata-dvr/openstack/control.yml
index 6232f79..7c0826a 100644
--- a/classes/cluster/virtual-mcp-ocata-dvr/openstack/control.yml
+++ b/classes/cluster/virtual-mcp-ocata-dvr/openstack/control.yml
@@ -73,6 +73,9 @@
       enabled: ${_param:designate_pool_manager_enabled}
       periodic_sync_interval: ${_param:designate_pool_manager_periodic_sync_interval}
     server:
+      mdns:
+        address: ${_param:designate_mdns_address}
+        port: ${_param:designate_mdns_port}
       pools:
         default:
           description: 'test pool'