Set retry for proxy to 0

Apache proxies for openstack aren't used as HA proxies, they are
simply ssl terminators in case of setup of ssl on internal endpoints
for services which don't support running under apache and wsgi.
So retry parameter is set 0, to eliminate maintenance mode for backend
which is 60 seconds by default.

Change-Id: I023ffff61e26520bd6ee625a18b5a7d0deeb94e1
Related-Prod: https://mirantis.jira.com/browse/PROD-25993
diff --git a/apache/server/proxy/openstack/neutron.yml b/apache/server/proxy/openstack/neutron.yml
index 1ed5726..ebef0d8 100644
--- a/apache/server/proxy/openstack/neutron.yml
+++ b/apache/server/proxy/openstack/neutron.yml
@@ -18,6 +18,7 @@
             host: ${_param:apache_proxy_openstack_neutron_host}
             port: 9696
             protocol: http
+            retry: ${_param:apache_proxy_openstack_neutron_retry}
           host:
             name: ${_param:apache_proxy_openstack_api_host}
             port: 9696