Build failed. https://zuul.opendev.org/t/openstack/buildset/35206a7e14e7422c8c9a8ed80ae6ee3e - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/66f32579109d4c52bd2e0aaf9a69422b : SUCCESS in 6m 11s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/25238b7cfd6e401cb3161af8d8e8a987 : SUCCESS in 4m 43s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9e935c03d42d4237b6b00fba2d9e27c6 : SUCCESS in 4m 29s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/21fb4b37cae044b98606a6749597ce98 : FAILURE in 5m 31s