Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8b816e9722734671bd033dcd7ddba0f1 : SUCCESS in 6m 05s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1b90198268a64a7396b4dd35d80f9646 : SUCCESS in 6m 22s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2cbea74287ef4353b2f52f047cb21513 : SUCCESS in 6m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a4099db9c2c845da8d3cda7230795792 : FAILURE in 5m 37s