Build failed. https://zuul.opendev.org/t/openstack/buildset/1e46aa62a8ea48fc84e2e2ff9c48cbdc - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/5ff46ef602bd4362adb8716ee1492bb2 : SUCCESS in 2m 56s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/440f16e0b2744892a164851dd7d493b7 : SUCCESS in 3m 09s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7f1f1d6eb0104424824e4d4be173d911 : FAILURE in 2m 59s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6775461a59e246c9b69d765c92115fe5 : FAILURE in 2m 40s