[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/117594d3022749e4806c7dcdbc8b66... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/4abe8e6f674a4d4c920be6cc0daee46d : SUCCESS in 5m 06s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c9ddb93834f14a4cb9f6619eb1d744e2 : SUCCESS in 4m 25s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/dae2730c78aa45e6813023a3c433dcd7 : SUCCESS in 5m 38s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/727d327f22eb4b20af6c4b40d4f6d5c9 : FAILURE in 4m 39s