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

Build failed. - periodic-horizon-docs-kilo http://logs.openstack.org/periodic-stable/periodic-horizon-docs-kilo/0f0f933... : SUCCESS in 4m 01s - periodic-horizon-python27-kilo http://logs.openstack.org/periodic-stable/periodic-horizon-python27-kilo/335... : SUCCESS in 5m 57s - periodic-horizon-docs-liberty http://logs.openstack.org/periodic-stable/periodic-horizon-docs-liberty/f473... : SUCCESS in 4m 32s - periodic-horizon-python27-liberty http://logs.openstack.org/periodic-stable/periodic-horizon-python27-liberty/... : FAILURE in 5m 03s