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

Build failed. - periodic-nova-docs-kilo http://logs.openstack.org/periodic-stable/periodic-nova-docs-kilo/c2963f7/ : SUCCESS in 6m 34s - periodic-nova-python27-kilo http://logs.openstack.org/periodic-stable/periodic-nova-python27-kilo/6cb6fb... : FAILURE in 12m 36s - periodic-nova-docs-liberty http://logs.openstack.org/periodic-stable/periodic-nova-docs-liberty/4195cdb... : SUCCESS in 9m 34s - periodic-nova-python27-liberty http://logs.openstack.org/periodic-stable/periodic-nova-python27-liberty/4a8... : FAILURE in 15m 06s