Comment 20 for bug 1496399

I've tested solution on Jenkins sandbox, it works:
https://jenkins-sandbox.infra.mirantis.net/job/7.0.fuel-library.pkgs.ubuntu.neutron_vlan_ha/1/console

But I've faced with another porblem with time synchronization by ntp on fuel master node. I think, that root cause of the problem - not the firewall rules, because that problem reproduced when all firewall rules are removed.