Build failed. https://zuul.opendev.org/t/openstack/buildset/0a6f813155f747d7998b39eacb8cf9f3 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8a602dfbed9a4c2aae1fb85fdcacc504 : SUCCESS in 3m 56s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/6b30f81ddb8f4b1eb960b2a3bb303364 : SUCCESS in 3m 02s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8f956ae070a6448bb48b91188a9ac31c : SUCCESS in 2m 56s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/9fb7927aa2b24777aa4486d71f3707e2 : FAILURE in 3m 11s