Extend OpenContrail salt-formula by disable_vnc_api_stats option

Add support of disable_vnc_api_stats configuration option for
config-api service to disable/enable sending statistics to collector
service

Related-PROD: PROD-35795
Change-Id: I81e6f10d3480ac6a2d2799ad9cc0ea4794ccba4b
diff --git a/metadata/service/control/cluster.yml b/metadata/service/control/cluster.yml
index 5b7ff7d..c7fb5c1 100644
--- a/metadata/service/control/cluster.yml
+++ b/metadata/service/control/cluster.yml
@@ -75,6 +75,7 @@
         - backup
         contrail-device-manager:
         - backup
+      disable_vnc_api_stats: True
     control:
       version: ${_param:opencontrail_version}
       enabled: true