Build failed. https://zuul.opendev.org/t/openstack/buildset/25ba64e22bb74fc690faca3d7ed13c01 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/4469ed2e98dc43558f4e88b51c8ae781 : SUCCESS in 4m 21s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/34a2dd2735ee48a79b1837f251eef663 : SUCCESS in 5m 34s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/523b2223f6a8427f8670d78427ff6ef2 : SUCCESS in 5m 41s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7621999a149643d58868196438377fd8 : FAILURE in 4m 51s