Build failed. https://zuul.opendev.org/t/openstack/buildset/acbf9d6fce7245708071907f55bba0c5 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1cfce256f6dd44a6ab8c8732aa1f2e3f : SUCCESS in 4m 09s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/687a46eda53f447b8a88780f37ebb00a : SUCCESS in 4m 11s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b71a26373c684267a4c34762c2603a31 : FAILURE in 4m 58s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/8fbef9fd10274a399c4e1119311efc88 : FAILURE in 5m 05s