[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/8d3b5... : SUCCESS in 7m 16s - periodic-horizon-python26-havana http://logs.openstack.org/periodic-stable/periodic-horizon-python26-havana/9... : FAILURE in 6m 25s - periodic-horizon-python27-havana http://logs.openstack.org/periodic-stable/periodic-horizon-python27-havana/1... : FAILURE in 4m 57s