Build failed. https://zuul.opendev.org/t/openstack/buildset/d63cd145b457488ca4980a4b0b0b88ab - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ba1d7ac17e044644b350ea9309baa211 : SUCCESS in 4m 30s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/7d35da9c7b3c42879ab01da62a9decad : SUCCESS in 4m 06s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/91faa0b8ff7e4718a8ae1a08f5218178 : SUCCESS in 5m 44s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/d5e31d921a1a48eab344193a364b12c1 : FAILURE in 3m 50s