Build failed. https://zuul.opendev.org/t/openstack/buildset/2407c37cc78740879fd815bb6bfd2cde - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/2f2499052c274d5e80cddf0c7d7a047d : SUCCESS in 3m 12s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ae24a11546c340dea7aa3b97f5c3b2f7 : SUCCESS in 5m 14s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/408cec0195e34ddfbec5c2350b105b74 : FAILURE in 5m 03s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/a0ecd60d7fbd4a54b217eb23afe3e8a0 : FAILURE in 2m 43s