Build failed. https://zuul.opendev.org/t/openstack/buildset/26b76a8db3b0470a9a37239d3db76859 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/7dc8c0dc21974166b7ddf2e3f98f9d99 : SUCCESS in 2m 51s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/6483d2d2e2034c58aebfa4b67096468c : SUCCESS in 3m 36s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/3949eaef8ab0484a8b88a722e1c9a699 : FAILURE in 4m 23s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/32387b11ef05466cb1872cd87fdf6377 : FAILURE in 2m 55s