Build failed. https://zuul.opendev.org/t/openstack/buildset/ba12818881fb436f8dfbbfb070c97fb6 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/23a23a9b09ad487a9d7e59d9d15f4c30 : SUCCESS in 3m 27s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/47505ca8e7e3443bbf203a8dc96d2058 : SUCCESS in 2m 49s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9a6c61825b254586b53cdafbe719e3ed : SUCCESS in 3m 01s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/5314893294904502904a7aada2863848 : FAILURE in 2m 31s