Build failed. https://zuul.opendev.org/t/openstack/buildset/5bcf6a58cab14c04b4da8f45a5cd9718 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/c84f54839ffb4426a4b0555e126b74d5 : SUCCESS in 3m 05s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/98d1d27c7d1441af8901ed645f993ed3 : SUCCESS in 4m 43s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d543684da2e54899abef2356888e4310 : SUCCESS in 2m 17s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/502825731be444f89a98a5688c4b2d77 : FAILURE in 3m 14s