Build failed. https://zuul.opendev.org/t/openstack/buildset/5729f5963fbe400b95efbdf92430f636 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/afdf4a19d5384575954f6410b49d3afb : SUCCESS in 2m 46s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f52b4418d8734837b2ab5c51b40479da : SUCCESS in 4m 09s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b56f3863530646f69ca94f0b3b4b5cf5 : FAILURE in 3m 11s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/29f0fced1a5f49fa955cb9dc15f32bb9 : FAILURE in 2m 50s