Build failed. https://zuul.opendev.org/t/openstack/buildset/f12c98f04b73438d89fca9b0de073df7 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6dd8157f5e964f93a51c3d6d2893d40c : SUCCESS in 4m 13s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d352bc0112044134890270886691960e : FAILURE in 3m 03s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/e0c3b5e6ea2e434da73b9750d8526ca0 : SUCCESS in 2m 54s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3f5415c994b04d2aa7ddcd3860b70f41 : FAILURE in 3m 06s