Build failed. https://zuul.opendev.org/t/openstack/buildset/31bca30705574f5bafd95eb155817d3b - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/aa9b003d80c44ed780d6425063c70b10 : SUCCESS in 3m 59s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/fab5ab609fc54402bbe33bf8c539d5a1 : SUCCESS in 3m 06s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3746a04608b644c3900ff7210528d31a : FAILURE in 2m 39s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/48710e50f6c84265a61e871ca18180b6 : FAILURE in 2m 52s