Build failed. https://zuul.opendev.org/t/openstack/buildset/72bb15f3dccc4cc9b35bf0906add1436 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/cb4b07c2c8b2402c9f15d1fa0ebd0dfc : SUCCESS in 4m 58s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/20ca79b0e0054ac7b157bc2e0f2e34f7 : SUCCESS in 6m 10s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ee6052fa01b44832b4075ead7db0868c : FAILURE in 3m 37s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6e639c0428e3465da3b2b26b03b46bf5 : FAILURE in 3m 16s