Build failed. https://zuul.opendev.org/t/openstack/buildset/74c6cb6e3a3e4f05af213684dbcbbb75 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/4a67310106aa49568b0c8b23582a46a6 : SUCCESS in 3m 31s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/6ff123fc15e74e3a95ad775f8424edf9 : SUCCESS in 4m 33s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c0ac82fffc964d5184230822be1d59f7 : SUCCESS in 4m 47s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5c2ab06acfcb499382bb0d9c06ea39b9 : FAILURE in 4m 14s