Updated openstack/openstack
Project: openstack/neutron  f5e31da0ff20b20e6b3206daebf277499e93c5d7
null
Return 409 for second firewall creation

Second firewall creation returns 500, but it is an expected behavior
of firewall reference implementation and an internal server error
should not be returned.

Change-Id: I9f537b238007d35172e2504591d9d3568ba3a41a
Closes-Bug: #1301105