Build failed. https://zuul.opendev.org/t/openstack/buildset/ac9e6955510148e493b11fc3292bfb59 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/72b37d17c3c94a3cbf2821da6e072e9b : SUCCESS in 3m 32s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/0c21c732ba4e4879940cf9f043e4c4fc : SUCCESS in 4m 56s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d66ea1bd4a8f4e0d9a8cd639c07ce564 : SUCCESS in 5m 31s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c0bc3cf54c3049aeb29632a629456b53 : FAILURE in 4m 16s