Build failed. https://zuul.opendev.org/t/openstack/buildset/fde7a50d9b9f4dc285481adeae9b55fe - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a3643613ed90470f86276538ff36f1ba : FAILURE in 4m 08s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/797e21addbfc446e8fb8a23ef8449036 : FAILURE in 4m 51s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3028c1d79f8a42cba7beed14362144fb : FAILURE in 4m 25s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/78cd7d0d7767429c877621a5fd4287a0 : FAILURE in 4m 20s