Build failed. https://zuul.opendev.org/t/openstack/buildset/8429b7a00dd94881b5aa65d76a6f64b0 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6018f84d768e4d6fb7ac09d41e115f6a : SUCCESS in 4m 03s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/39d93ae6167644eb9d1977fcd4d1fbc3 : SUCCESS in 4m 17s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/fe157f14cee346ea885df675afde01fc : SUCCESS in 5m 38s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a7e37f3f0e97413fa1b156494c7608e3 : FAILURE in 3m 39s