Build failed. https://zuul.opendev.org/t/openstack/buildset/d6ff8fc591f64d2c9c52eb35b4c2603c - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/2ed2107813d44b7192d18b76eab6db72 : SUCCESS in 3m 15s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/322ce3ee3b6f480b99bf4a99673c10af : SUCCESS in 3m 40s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c22ce1d5a34348278ebff24ad1d1fd68 : SUCCESS in 3m 02s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/4f28e9a8f8da4c4c87b39ebc59536272 : FAILURE in 3m 25s