Fix the upgrade haproxy failed
Fix the upgrade haproxy failed

The haproxy failed when there is one stand alone network node

Closes-Bug: #1598339
Change-Id: I3390ee37eb51c292fc5149fc22b4f6a6f07da688

coolsvap/kolla,stackforge/kolla,dardelean/kolla-ansible,rahulunair/kolla,rahulunair/kolla,openstack/kolla,nihilifer/kolla,GalenMa/kolla,mrangana/kolla,stackforge/kolla,stackforge/kolla,mandre/kolla,mandre/kolla,coolsvap/kolla,coolsvap/kolla,mrangana/kolla,openstack/kolla,mandre/kolla,nihilifer/kolla,dardelean/kolla-ansible,dardelean/kolla-ansible,GalenMa/kolla,intel-onp/kolla,intel-onp/kolla