Updated openstack/openstack
Project: openstack/neutron  a6d7a5f4506fa2b1ce748dbd6724d9a579a7f397

Fix L2 agent does not remove unused ipset set

The patch fixes L2 agent does not remove unused ipset set when security
group contains rules for only IPv4 or IPv6.

Change-Id: I375b1683cd763c0a33dc935558c637874d36ffa1
Closes-bug: #1373287