Updated openstack/openstack
Project: openstack/neutron  cf22dd2ff9a4da6777043300127d14e73db4f1ed
null
Delete disassociated floating ips on external network deletion

Also remove redundant check for network in use in bigswitch plugin

Closes-Bug: #1238439
Closes-Bug: #1259144

Change-Id: I7586f43c2e99be9df491c68bf1e8658994ffd263