Build failed. https://zuul.opendev.org/t/openstack/buildset/314bf7d7f9654553b32eab510fc0c753 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/97d379c7d3854687a546d350be44931e : SUCCESS in 4m 07s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f25f84140575448ba36374fff99c1f82 : SUCCESS in 5m 05s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a5be3424fd124f59b0c88b5887455d16 : SUCCESS in 4m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0c9061c2840240e196dcc17be81995a0 : FAILURE in 4m 11s