Refresh haproxy config during galera upgrade

This change is following DB split connection feature

PROD-36562

Change-Id: I3cdb9a3e4e17f1d6aa143db19c68d4dd887f58f1
diff --git a/openstack-control-upgrade.groovy b/openstack-control-upgrade.groovy
index 5929390..97e4797 100644
--- a/openstack-control-upgrade.groovy
+++ b/openstack-control-upgrade.groovy
@@ -167,6 +167,9 @@
       }
     }
 
+    common.infoMsg("Refreshing haproxy config for mysql proxies")
+    salt.enforceState(env, 'I@haproxy:proxy:listen:mysql_cluster', ['haproxy.proxy'])
+
     for (target in upgradeTargets) {
       common.stageWrapper(upgradeStageMap, "Upgrade OS", target, interactive) {
         if (OS_DIST_UPGRADE.toBoolean() == true){