Build failed. https://zuul.opendev.org/t/openstack/buildset/9477278e18bf440ead148d726afd353a - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/371e5e4e397d45cabe4cd5516e17c4e8 : SUCCESS in 3m 31s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/0aa68c380a694d8d834920d32c59159f : SUCCESS in 2m 29s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/838ba5146ce54df88676ca6051caab52 : FAILURE in 3m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/4c9b08b578d84c07a8592a65259d3db0 : FAILURE in 2m 39s