[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/e2d2bb87a37c4da8b4f08890dce953... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/42216ed36da94cd5bb9148c86b1501c9 : SUCCESS in 4m 12s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/53ab73d9db404a3d82ae23ce2c57ef0d : SUCCESS in 3m 37s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/648c7c1c513d45f2ae488271cb7c6793 : SUCCESS in 3m 43s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3ba4a024f8f04885a87a3fab3927d4dd : FAILURE in 4m 06s