Build failed. https://zuul.opendev.org/t/openstack/buildset/1ce31d0a9b1f4459bb8cb8645a478368 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6cdc8f1370924d5285baa0a918b2c4a2 : SUCCESS in 5m 03s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/91dd5ab589b4412090406ec37632fbf8 : SUCCESS in 5m 02s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/0c5084676be54517b1296c6c0b22c9c4 : SUCCESS in 5m 06s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/06070ba0f542412a8bf0e3cdc05992d4 : FAILURE in 4m 03s