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

Build failed. - periodic-horizon-docs-juno http://logs.openstack.org/periodic-stable/periodic-horizon-docs-juno/c9b3993... : SUCCESS in 3m 33s - periodic-horizon-python26-juno http://logs.openstack.org/periodic-stable/periodic-horizon-python26-juno/2dd... : FAILURE in 2m 16s - periodic-horizon-python27-juno http://logs.openstack.org/periodic-stable/periodic-horizon-python27-juno/984... : FAILURE in 2m 34s - periodic-horizon-docs-kilo http://logs.openstack.org/periodic-stable/periodic-horizon-docs-kilo/1605910... : SUCCESS in 3m 26s - periodic-horizon-python27-kilo http://logs.openstack.org/periodic-stable/periodic-horizon-python27-kilo/2eb... : SUCCESS in 4m 58s