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

Build failed. - periodic-nova-docs-liberty http://logs.openstack.org/periodic-stable/periodic-nova-docs-liberty/d93e4cb... : SUCCESS in 7m 19s - periodic-nova-python27-db-liberty http://logs.openstack.org/periodic-stable/periodic-nova-python27-db-liberty/... : FAILURE in 3m 47s - periodic-nova-docs-mitaka http://logs.openstack.org/periodic-stable/periodic-nova-docs-mitaka/2b574b5/ : SUCCESS in 7m 37s - periodic-nova-python27-db-mitaka http://logs.openstack.org/periodic-stable/periodic-nova-python27-db-mitaka/2... : SUCCESS in 10m 57s