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

Build failed. - periodic-horizon-docs-havana http://logs.openstack.org/periodic-stable/periodic-horizon-docs-havana/48667... : SUCCESS in 4m 43s - periodic-horizon-python26-havana http://logs.openstack.org/periodic-stable/periodic-horizon-python26-havana/2... : FAILURE in 1m 06s - periodic-horizon-python27-havana http://logs.openstack.org/periodic-stable/periodic-horizon-python27-havana/2... : SUCCESS in 4m 32s