[Openstack-stable-maint] Stable check of openstack/oslo.utils for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/c7370ecc55384ff4ae878f840700a6... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8fe410edf00345fc90838c4b8c7676f7 : SUCCESS in 4m 58s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/26c39c9fd3a84498b6ae2aa5f19a844e : SUCCESS in 7m 15s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/6c2040f8f2f24ff98b4a78a33fb3a063 : SUCCESS in 5m 19s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/aa93c19c07d74192a30a0170f09bc441 : FAILURE in 4m 41s