Build failed. https://zuul.opendev.org/t/openstack/buildset/2ca57c3c550847b28f37edcc3fd7dee2 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d0dc37ebc9054797acba4fe5006ef4ff : SUCCESS in 4m 14s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b904ad3f6ddd4664b0b086630ad689d9 : SUCCESS in 3m 19s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2fbc67956d09499b975205c8d6599a65 : FAILURE in 3m 14s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/726dea3f065b4e8ab695e84862bbea99 : FAILURE in 2m 38s