Comment 3 for bug 1529937

Double checked this in Neutron: floating IPs are created synchronously in the sense that 201 (Created) status is only returned when the floating IP entry is already *committed* to a DB. Given the fact Galera guarantees synchronous replication and simultaneous COMMIT on all nodes of Galera cluster, I'm confused how can we see the results from #2, where there is no corresponding floating IP entry in the DB on the subsequent HTTP request.