Update sl-pike-dvr model

Change-Id: If2ea2690b2787528e918bdc4477453360f2d2c2c
Closes-Bug: PROD-21138
diff --git a/classes/cluster/sl-pike-dvr/stacklight/client.yml b/classes/cluster/sl-pike-dvr/stacklight/client.yml
index 4988908..10711a7 100644
--- a/classes/cluster/sl-pike-dvr/stacklight/client.yml
+++ b/classes/cluster/sl-pike-dvr/stacklight/client.yml
@@ -13,7 +13,9 @@
     grafana_port: 15013
     grafana_user: admin
     grafana_password: ${_param:grafana_admin_password}
-    grafana_prometheus_address: ${_param:stacklight_monitor_address}
+    # Pin grafana to Prometheus LTS
+    #grafana_prometheus_address: ${_param:stacklight_monitor_address}
+    grafana_prometheus_address: ${_param:openstack_control_address}
     grafana_prometheus_port: 15016
 
     cluster_node01_address: ${_param:stacklight_monitor_node01_address}