[Openstack-stable-maint] Stable check of openstack/neutron failed

Build failed.

- periodic-neutron-docs-havana http://logs.openstack.org/periodic-stable/periodic-neutron-docs-havana/0e45c... : SUCCESS in 2m 05s - periodic-neutron-python26-havana http://logs.openstack.org/periodic-stable/periodic-neutron-python26-havana/3... : FAILURE in 20m 47s - periodic-neutron-python27-havana http://logs.openstack.org/periodic-stable/periodic-neutron-python27-havana/1... : SUCCESS in 19m 47s