Bump grafana version to 5.0.3

Change-Id: I623203d2a89e2cdb724c19a9564415825721a1fc
diff --git a/classes/cluster/virtual-mcp-pike-dvr-ceph-rgw/stacklight/server.yml b/classes/cluster/virtual-mcp-pike-dvr-ceph-rgw/stacklight/server.yml
index a21572d..062d79b 100644
--- a/classes/cluster/virtual-mcp-pike-dvr-ceph-rgw/stacklight/server.yml
+++ b/classes/cluster/virtual-mcp-pike-dvr-ceph-rgw/stacklight/server.yml
@@ -52,7 +52,7 @@
     docker_image_remote_storage_adapter: docker-prod-local.artifactory.mirantis.com/openstack-docker/remote_storage_adapter:${_param:apt_mk_version}
     docker_image_remote_collector: docker-prod-local.artifactory.mirantis.com/openstack-docker/heka:${_param:apt_mk_version}
     docker_image_prometheus_relay: docker-prod-local.artifactory.mirantis.com/openstack-docker/prometheus_relay:${_param:apt_mk_version}
-    docker_image_grafana: grafana/grafana:4.5.2
+    docker_image_grafana: grafana/grafana:5.0.3
     influxdb_port: 8086
     influxdb_admin_password: password
     influxdb_stacklight_password: lmapass