[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/d38c8... : SUCCESS in 5m 48s - periodic-horizon-python26-havana http://logs.openstack.org/periodic-stable/periodic-horizon-python26-havana/f... : FAILURE in 47s - periodic-horizon-python27-havana http://logs.openstack.org/periodic-stable/periodic-horizon-python27-havana/f... : SUCCESS in 3m 59s