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

Build failed. - periodic-horizon-docs-liberty http://logs.openstack.org/periodic-stable/periodic-horizon-docs-liberty/ad40... : POST_FAILURE in 9m 54s - periodic-horizon-python27-liberty http://logs.openstack.org/periodic-stable/periodic-horizon-python27-liberty/... : POST_FAILURE in 15m 56s - periodic-horizon-docs-mitaka http://logs.openstack.org/periodic-stable/periodic-horizon-docs-mitaka/cbb61... : POST_FAILURE in 9m 01s - periodic-horizon-python27-mitaka http://logs.openstack.org/periodic-stable/periodic-horizon-python27-mitaka/2... : POST_FAILURE in 16m 00s