Updated openstack/openstack
Project: openstack/neutron  0ad5c0437d0b44e4f220d27be27880cfdf8abef4
null
BigSwitch: Sync workaround for port del deadlock

Adds a synchronization barrier to the methods
that lock the port table to avoid the mysql
update-lock/eventlet-yield deadlock that occurs
with simultaneous port deletions.

Closes-Bug: #1292232
Change-Id: I8975a14a937a5843a0395ad7b599ebdc827565ed