Build failed. https://zuul.opendev.org/t/openstack/buildset/c02f1df5ccde47cfab521733d1758b31 - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/d55543e2eecb41568161a4f0257a38f8 : FAILURE in 5m 12s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e3deab458dc047cd9de8f54d83add562 : FAILURE in 3m 40s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/37f0ed204426486dbd9d6ef70cd5a063 : FAILURE in 4m 31s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c97ff1b945e344b99f92957a3dba5d1e : FAILURE in 6m 36s