Build failed. https://zuul.opendev.org/t/openstack/buildset/49614ac7d4a84c88b26986cbb12ca163 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/535a6fabf8eb4778a55b1fa7d5bd6214 : SUCCESS in 4m 01s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d907111ebd1a4ddbbabf776f01b1b42d : SUCCESS in 3m 17s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c570bb658c854c83956ce6df851fa723 : FAILURE in 2m 53s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/d0a94c5a9b5e45d281434897d2943798 : FAILURE in 2m 41s