Build failed. https://zuul.opendev.org/t/openstack/buildset/0519321805084ee7846b15c94c9c8017 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f24a6aacccaf43df8d34cf51b04f47ec : SUCCESS in 2m 54s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d7fe256943b14d1eb644a5f541e497d5 : SUCCESS in 2m 30s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/1518cf33160e4c1e94468498c7a9a439 : SUCCESS in 2m 42s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/19a91813fd024b72a2d492ac671a994c : FAILURE in 2m 54s