Disable Dashboard add-on for contrail deployment

Dashboard deployment is not working now because it requires setting
up endpoints, which refers to vars that were lost in git history.

Change-Id: I04f71d1424fb86764fcc40f81df289cf6f755d3a
diff --git a/classes/cluster/virtual-mcp11-k8s-contrail/kubernetes/control.yml b/classes/cluster/virtual-mcp11-k8s-contrail/kubernetes/control.yml
index ed10734..b7f0742 100644
--- a/classes/cluster/virtual-mcp11-k8s-contrail/kubernetes/control.yml
+++ b/classes/cluster/virtual-mcp11-k8s-contrail/kubernetes/control.yml
@@ -36,6 +36,8 @@
         netchecker:
           enabled: ${_param:kubernetes_netchecker_enabled}
       addons:
+        dashboard:
+          enabled: false
         helm:
           enabled: ${_param:kubernetes_helm_enabled}
         netchecker: