[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/bc7b6a4586f34477a31dce626cab4b... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/2347b85b754640a781dbd953b92f31ed : SUCCESS in 4m 52s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f8ff3d0bdea343b79b1492025404302e : SUCCESS in 5m 50s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b2adf0f65e5f48609cdd6ae819184da0 : SUCCESS in 5m 21s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/889163a6c9d64929a0aa12bd62c46b82 : FAILURE in 4m 05s