Fix prx node public host

Change-Id: Ic84184c4b35dc9e6c010be946019edf4f3e7ffc9
Related-Bug: PROD-19837
diff --git a/classes/cluster/virtual-offline-pike-ovs/openstack/proxy.yml b/classes/cluster/virtual-offline-pike-ovs/openstack/proxy.yml
index e055dee..f7319b6 100644
--- a/classes/cluster/virtual-offline-pike-ovs/openstack/proxy.yml
+++ b/classes/cluster/virtual-offline-pike-ovs/openstack/proxy.yml
@@ -7,6 +7,7 @@
 - cluster.virtual-offline-pike-ovs
 parameters:
   _param:
+    cluster_public_host:  ${_param:openstack_proxy_address}
     nginx_proxy_ssl:
       enabled: true
       authority: ${_param:salt_minion_ca_authority}