Build failed. https://zuul.opendev.org/t/openstack/buildset/5c46e887cfa142efa7c6ffba8f8839f1 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/486adbed5e334adda96063bd7100e1dd : SUCCESS in 4m 59s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/741318591306457e961b660805228bbc : SUCCESS in 4m 19s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/5af562591dd54f1cbbaab9dcb3a8bbfc : SUCCESS in 5m 21s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7b0754f989a54c258ce996ba5730e822 : FAILURE in 3m 56s