[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/accb8dda24804d52aa2acdd2cdbd48... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/65aeb3006bac4d4d852e57d668f5d379 : SUCCESS in 5m 12s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/72d5eacf6ad3455a978b575b1b1a0b86 : SUCCESS in 5m 33s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/6742c12dbf4944f0a31c4147c1a89f6b : SUCCESS in 6m 55s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7f9cfe055a464f46bda906957af020ca : FAILURE in 3m 29s