Fwaas(reduce the associated floatingip count to zero):the firewall rules which in the qrouter namespace will not be cleaned, after delete the firewall.

[wujun]

environment: Mitaka

In the DVR mode:
1.create the router, network, vm, firewall
2.bind the firewall to the router, after associate the floatingip to the wm
3.disassociate the floatingip
4.delete the firewall

The firewall rules still in the qrouter namespace.