Build failed. https://zuul.opendev.org/t/openstack/buildset/fc805459d37f49588c53403eda8539ed - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ac398182da884b8e859f5af5610afffd : SUCCESS in 2m 51s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e2c335f6576641b69db1474de3f974ba : SUCCESS in 2m 31s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/cf1f9aa1bcbf435fae49279b3684d41d : FAILURE in 2m 57s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/22bc99c6d8034f6f81aa3525bc8295a4 : FAILURE in 3m 30s