Comment 1 for bug 1573583

It's by this change:

https://review.openstack.org/#/c/224857/71/deployment/puppet/osnailyfacter/modular/virtual_ips/conntrackd.pp

The following conditional is missing after that patch:
if $network_metadata['vips']["vrouter_${vrouter_name}"]['namespace'] {

So we need to put it back in order to fix this bug and also add a noop tests to avoid such regressions in the future.