[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/9527a... : SUCCESS in 4m 30s - periodic-horizon-python26-havana http://logs.openstack.org/periodic-stable/periodic-horizon-python26-havana/9... : FAILURE in 4m 56s - periodic-horizon-python27-havana http://logs.openstack.org/periodic-stable/periodic-horizon-python27-havana/4... : SUCCESS in 4m 32s