Fix for unexisting stable repos on mon01 node

Use nightly instead. Similar issue in:
https://gerrit.mcp.mirantis.net/#/c/16570/2

Change-Id: Ia5b4b4e3e74fec5bdb91935e6a3e7ea38cd55259
diff --git a/classes/cluster/virtual-mcp11-contrail/stacklight/client.yml b/classes/cluster/virtual-mcp11-contrail/stacklight/client.yml
index 7708c05..4988908 100755
--- a/classes/cluster/virtual-mcp11-contrail/stacklight/client.yml
+++ b/classes/cluster/virtual-mcp11-contrail/stacklight/client.yml
@@ -4,7 +4,6 @@
 - system.grafana.client
 - system.grafana.client.datasource.prometheus
 - system.kibana.client.single
-- cluster.virtual-mcp11-contrail
 parameters:
   _param:
     # Elasticsearch/Kibana client parameters