Fix interpolation collision between openstack/stacklight for cicd

Change-Id: I76265afbcb9085b86f805e08f8f4daee260b8657
diff --git a/classes/cluster/virtual-mcp-ocata-cicd/stacklight/proxy.yml b/classes/cluster/virtual-mcp-ocata-cicd/stacklight/proxy.yml
index 956ee51..3b6d25e 100644
--- a/classes/cluster/virtual-mcp-ocata-cicd/stacklight/proxy.yml
+++ b/classes/cluster/virtual-mcp-ocata-cicd/stacklight/proxy.yml
@@ -8,7 +8,7 @@
 - cluster.virtual-mcp-ocata-cicd.infra
 parameters:
   _param:
-    cluster_public_host: ${_param:prometheus_control_address}
+    #cluster_public_host: ${_param:prometheus_control_address}
     nginx_proxy_grafana_port: 15013
     nginx_proxy_ssl:
       enabled: true