Build failed. https://zuul.opendev.org/t/openstack/buildset/abb07302bc46446cb5301ea3aa9cc018 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/e2f1b9690f0e4fffb24aa2f32018f0a7 : SUCCESS in 4m 54s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/a0fa5a3e39714ea8a65d565b0c42a195 : SUCCESS in 4m 21s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d62362d5e31e493cbfed232242805719 : SUCCESS in 4m 24s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a8273e6f901b47459f06a74c7ec66ed9 : FAILURE in 4m 36s