Build failed. https://zuul.opendev.org/t/openstack/buildset/195e96ccaa2b49f1bfe14e66f3ce267d - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d4d5723c065e44ca83e6752856c8ab56 : SUCCESS in 3m 15s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/cac343033633404ea32acb99e7fcc4f0 : SUCCESS in 3m 06s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/d223f25dee8342709d6a97290f2d73ab : FAILURE in 4m 13s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/1353fdaee9434dcb9f36a354ce29868c : FAILURE in 3m 13s