Fix designate proxy in os-ha-ovs

This patch adds nginx configuration for designate on proxy node. This
allows to get to designate api by public endpoint.

Change-Id: Ibaefb26f02c687f67e687a1001a41a7305101dc6
Related-Prod: https://mirantis.jira.com/browse/PROD-16624
diff --git a/classes/cluster/os-ha-ovs/openstack/proxy.yml b/classes/cluster/os-ha-ovs/openstack/proxy.yml
index 1f296ae..8b2e13c 100644
--- a/classes/cluster/os-ha-ovs/openstack/proxy.yml
+++ b/classes/cluster/os-ha-ovs/openstack/proxy.yml
@@ -3,6 +3,7 @@
 - system.nginx.server.proxy.openstack_api
 - system.nginx.server.proxy.openstack_vnc
 - system.nginx.server.proxy.openstack_web
+- system.nginx.server.proxy.openstack.designate
 - system.salt.minion.cert.proxy
 - cluster.os-ha-ovs.openstack.dashboard
 - cluster.os-ha-ovs