Build failed. https://zuul.opendev.org/t/openstack/buildset/dcf328e1c5e3412cb0a9d2e9c8da6e4a - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1f0f100b6be44342936e52304263348e : SUCCESS in 3m 18s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/407bc9818f294893ad8242478847f05c : SUCCESS in 3m 09s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b1625a60932b435daaf530647e807041 : FAILURE in 4m 06s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/491662439bef4da9ba5dab1d46e631c3 : FAILURE in 2m 54s