Updated openstack/openstack
Project: openstack/neutron  18a10fae3049cd09f5c8709ea7d7ab13b4f0efa2

ofagent: Upgrade note about firewall_driver

The corresponding devstack change: https://review.openstack.org/#/c/108915/

Related: blueprint ofagent-port-monitor
Change-Id: Ic917692d50461b1d5c4a07c988839e9f886b91d5