Build failed. https://zuul.opendev.org/t/openstack/buildset/35271bce089c4e0d83374b9dde496dfb - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/35e1ef24ed714554bc42bd2a09efae8a : SUCCESS in 4m 03s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/6f25223f33d9409fa86f8b9a97092064 : SUCCESS in 3m 22s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/940da630b76e401f94e9a9a2f953b0ed : FAILURE in 3m 15s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f63e65dd721e4cc8804d3e3ee82a80f7 : FAILURE in 2m 28s