Fix prx node public host

Change-Id: Ic84184c4b35dc9e6c010be946019edf4f3e7ffc9
Related-Bug: PROD-19837
diff --git a/classes/cluster/virtual-mcp-pike-dvr-ceph-rgw/openstack/proxy.yml b/classes/cluster/virtual-mcp-pike-dvr-ceph-rgw/openstack/proxy.yml
index 088af83..8de7a84 100644
--- a/classes/cluster/virtual-mcp-pike-dvr-ceph-rgw/openstack/proxy.yml
+++ b/classes/cluster/virtual-mcp-pike-dvr-ceph-rgw/openstack/proxy.yml
@@ -8,6 +8,7 @@
 - cluster.virtual-mcp-pike-dvr-ceph-rgw
 parameters:
   _param:
+    cluster_public_host:  ${_param:openstack_proxy_address}
     nginx_proxy_ssl:
       enabled: true
       authority: ${_param:salt_minion_ca_authority}