Add proxy for Grafana service

Change-Id: I0a3d5d73cdd7e6e10c866b78993b8ce171e2e4ed
diff --git a/classes/cluster/virtual-mcp11-dvr/stacklight/proxy.yml b/classes/cluster/virtual-mcp11-dvr/stacklight/proxy.yml
index ed66487..422bb8f 100644
--- a/classes/cluster/virtual-mcp11-dvr/stacklight/proxy.yml
+++ b/classes/cluster/virtual-mcp11-dvr/stacklight/proxy.yml
@@ -1,10 +1,12 @@
 classes:
 - system.nginx.server.single
+- system.nginx.server.proxy.stacklight.grafana
 - system.nginx.server.proxy.stacklight.kibana
 - system.salt.minion.cert.proxy
 - cluster.virtual-mcp11-dvr
 parameters:
   _param:
+    nginx_proxy_grafana_port: 15013
     nginx_proxy_ssl:
       enabled: true
       authority: ${_param:salt_minion_ca_authority}