Build failed. https://zuul.opendev.org/t/openstack/buildset/638264fc5ad247d1936043e949edc319 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/7ff4c4b0662a468582aee3c3054e08fe : SUCCESS in 4m 35s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a01ce7826bd94a659efd40b86d5c7055 : SUCCESS in 4m 13s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4ab24c875aee45bfa91c64fc7c6b0873 : SUCCESS in 3m 59s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/8eff012cbb6943aa945ce3c8a8973fd0 : FAILURE in 4m 03s