Comment 1 for bug 2091021

At first glance it looked like similar to https://bugs.launchpad.net/neutron/+bug/2083609 but it is not. After deeper look into this it seems for me that sometime we may hit an issue when keepalived will do failover "too fast" and vm.assert_no_ping(external.ip) will fail as ping will be already working after keepalived will do failover.

I think we should remove that assertion from the test as it relies on the external tool (keepalived) which we can't really control and due to that we may hit issues like that from time to time.