Build failed. https://zuul.opendev.org/t/openstack/buildset/bdcea66b12904c74aac6728f483beaf8 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1d7e807269c74fb4921ebe3c0d77f0bb : SUCCESS in 3m 06s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f0513ab131904539bfd9cde948d537c8 : SUCCESS in 5m 04s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/c4d7c5bd485644bea584594da8f45f44 : FAILURE in 4m 09s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6eb64cf1d87f42f5bccfe74884d4b716 : FAILURE in 2m 50s