Build failed. https://zuul.opendev.org/t/openstack/buildset/abfabc2e55bc4391b1aa37f396e46fe1 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/599a237070134346875b44f505825330 : SUCCESS in 3m 45s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ff912e4d10924c60a758cf9a72566f96 : SUCCESS in 3m 16s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/367c08dacebb435d9370eabbb4f6f447 : FAILURE in 3m 07s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a3daa1565c664da3accc30247fe4af47 : FAILURE in 2m 47s