Build failed. https://zuul.opendev.org/t/openstack/buildset/5615a90b1ef348a28168c58449c0d726 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/cdf8ee00fb6d4ed08f3d740a9c8b9d62 : SUCCESS in 4m 51s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ea729217262a4bb293a3d1b3738eeeeb : SUCCESS in 3m 55s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/bda26c09ca224cee998045a435739f46 : SUCCESS in 4m 38s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/ed18f66f4ab2406bb6fcd636be084ed8 : FAILURE in 4m 43s