Enable Grafana GlusterFS volume

Change-Id: Ia2da2d1aa1b0e250b6070aa108d141b14804642f
diff --git a/classes/cluster/virtual-mcp11-contrail/stacklight/server.yml b/classes/cluster/virtual-mcp11-contrail/stacklight/server.yml
index 07673ba..51dcfd4 100755
--- a/classes/cluster/virtual-mcp11-contrail/stacklight/server.yml
+++ b/classes/cluster/virtual-mcp11-contrail/stacklight/server.yml
@@ -9,6 +9,7 @@
 - system.heka.remote_collector.output.elasticsearch
 - system.glusterfs.client.cluster
 - system.glusterfs.client.volume.prometheus
+- system.glusterfs.client.volume.grafana
 - system.elasticsearch.server.cluster
 - system.elasticsearch.server.curator
 - system.kibana.server.single
@@ -46,6 +47,7 @@
     grafana_database_type: mysql
     grafana_database_host: ${_param:openstack_database_address}
     grafana_database_password: ${_param:mysql_grafana_password}
+    docker_grafana_replicas: 3
     docker_image_alertmanager: mirantis/alertmanager:latest
     docker_image_pushgateway: mirantis/pushgateway:latest
     docker_image_prometheus: mirantis/prometheus:latest