CBQE-0: failovertests, add alternative iptables --list on wind

Change-Id: Ie2d89c70dcd35c1b9bf8fc2b2cfebc4f07408847
Reviewed-on: http://review.couchbase.org/26410
Reviewed-by: Andrei Baranouski <andrei.baranouski@gmail.com>
Tested-by: Andrei Baranouski <andrei.baranouski@gmail.com>