Build failed. https://zuul.opendev.org/t/openstack/buildset/ac3172be5a4441a7be1446e5c2db3cca - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/77d145854d2f47d386e3e45eec067667 : SUCCESS in 4m 02s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/fe2a5fabae1d4dbdb2d51e1e6602b535 : SUCCESS in 2m 57s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b379226263f94420999188b5fec32e49 : SUCCESS in 3m 12s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/8fd8e4026460469dabdb7f5650ffa0dd : FAILURE in 2m 59s