Comment 6 for bug 1260224

Eugene, this migration does not exist in Havana, does it? I thought this was a relatively recent change in icehouse.

For anyone who is being blocked on using devstack with Neutron because of this, my workaround was to set Q_PLUGIN=openvswitch in my localrc. That allows devstack to complete successfully and Neutron seems to be working fine using openvswitch directly instead of through ml2.