Build failed. https://zuul.opendev.org/t/openstack/buildset/37518079c9c248a38bc8ef99cef1cbab - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a183e48b57aa4a6e8b32b88a00190f53 : SUCCESS in 4m 32s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ebfd3e3f88be4152a69e0923a43a2346 : SUCCESS in 5m 01s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/84a4e7235db64b179a9284851f407cba : SUCCESS in 4m 29s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/8b0fab53c64d4d4f9de3eef9a16b1228 : FAILURE in 4m 52s