Comment 8 for bug 1260224

The broken migrations for ML2 were discussed in the neutron meeting:
http://eavesdrop.openstack.org/meetings/neutron/2013/neutron.2013-11-25-21.01.log.html

and follow-up discussions took place on #openstack-neutron:
http://eavesdrop.openstack.org/irclogs/%23openstack-neutron/%23openstack-neutron.2013-12-23.log
See time-stamps 2013-12-23T22:01:45 to 2013-12-23T22:36:29