Build failed. https://zuul.opendev.org/t/openstack/buildset/e6cb9a378fd5474eb5ca8ff16755f8ac - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/7ee3cd856c794e97abe9be1b68e6b117 : SUCCESS in 2m 50s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b2638754740a4c75aaf207996f135c14 : SUCCESS in 4m 03s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/6b3139d7c8364252a46d7a2f92ddb15c : SUCCESS in 4m 16s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b3fbbf3cc6794d2aa5ab3ebb94b7a7b0 : FAILURE in 3m 47s