Build failed. https://zuul.opendev.org/t/openstack/buildset/8d2bef33b7d84e60ad860ce381271197 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ad8af5fa25da4d20af213b1ff8c6ed9c : SUCCESS in 3m 16s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/4bb48475fc694609bfe1781391c3cbe4 : SUCCESS in 2m 25s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/6e3e684b266d43c2b88187e5f7a17093 : SUCCESS in 2m 50s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/162157ea0a514189aafb1d8417ee571c : FAILURE in 2m 23s