Build failed. https://zuul.opendev.org/t/openstack/buildset/168337abd30f4626ba564c2ac55fb73f - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ccde6e42c8334656975a2a91f8f9b63a : SUCCESS in 4m 31s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/268e1d03188a4b5bb52d06fe7cd166dd : SUCCESS in 5m 57s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4fc612c875cb4428b9628986c747252b : SUCCESS in 5m 03s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6c988da1c3e5419f8abae0768a59086d : FAILURE in 4m 26s