Specify which Grafana image version to use

Change-Id: If896c2462f1a3cee82f8e13c8236dfedef063d7d
diff --git a/classes/cluster/virtual-mcp11-contrail/stacklight/server.yml b/classes/cluster/virtual-mcp11-contrail/stacklight/server.yml
index 51dcfd4..61345fa 100755
--- a/classes/cluster/virtual-mcp11-contrail/stacklight/server.yml
+++ b/classes/cluster/virtual-mcp11-contrail/stacklight/server.yml
@@ -53,7 +53,7 @@
     docker_image_prometheus: mirantis/prometheus:latest
     docker_image_remote_agent: mirantis/telegraf:latest
     docker_image_remote_storage_adapter: mirantis/remote_storage_adapter:latest
-    docker_image_grafana: grafana/grafana:latest
+    docker_image_grafana: grafana/grafana:4.3.2
     prometheus_glusterfs_service_host: ${_param:openstack_control_address}
     glusterfs_node01_address: ${_param:openstack_control_node01_address}
     glusterfs_node02_address: ${_param:openstack_control_node02_address}