Build failed. https://zuul.opendev.org/t/openstack/buildset/8dc87d31fba44a2694263fa4441a9df1 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e38d03c38aa44c0fa547fe48e5d14775 : SUCCESS in 2m 55s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/5fa056767dd44be88d5fb3e3d9c21006 : SUCCESS in 3m 32s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3f7658640a3a425bb577abae377dc27b : SUCCESS in 2m 38s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b0c6ebd5e9ac4e3da31c0825f249279f : FAILURE in 2m 58s