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

Build failed. - periodic-heat-docs-liberty http://logs.openstack.org/periodic-stable/periodic-heat-docs-liberty/f3df176... : SUCCESS in 2m 39s - periodic-heat-python27-db-liberty http://logs.openstack.org/periodic-stable/periodic-heat-python27-db-liberty/... : FAILURE in 8m 26s - periodic-heat-docs-mitaka http://logs.openstack.org/periodic-stable/periodic-heat-docs-mitaka/a59d8bf/ : SUCCESS in 4m 12s - periodic-heat-python27-db-mitaka http://logs.openstack.org/periodic-stable/periodic-heat-python27-db-mitaka/d... : SUCCESS in 8m 02s