Build failed. https://zuul.opendev.org/t/openstack/buildset/8fa513086e5b49ed9f7a88b0bf760d1e - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/28c2334ccd6044b99317d4487f1eaf68 : SUCCESS in 3m 53s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9b26d104dfb34f7080306f8a5fdf424f : SUCCESS in 7m 58s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/377943e4330549a8b041e714d5db5609 : SUCCESS in 4m 37s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/4a4d98c4f528474b8e52f4750c601d74 : FAILURE in 5m 04s