Build failed. https://zuul.opendev.org/t/openstack/buildset/ccb7a3d8b0884a43b7e3d6b14c66716a - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/fc78b7fbc6df46bb8071aa3300f3cb60 : SUCCESS in 3m 13s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/28bcfc2461e548a4ae2fd4d9ffb0edfb : SUCCESS in 2m 50s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b37359623f36473d993fed222fcea03d : FAILURE in 3m 02s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/bda9dedc2d9642a4819fe5da860bc6e6 : FAILURE in 2m 51s