[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/79f16ce5252c4681bb4d1187e481c7... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/2616921ac42b4a748cd352f47bb2bbf6 : SUCCESS in 4m 48s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/28ba63de5d3b4ba58b99011e3266208c : SUCCESS in 4m 55s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/1ab7dd548dc74b9db05b20df40ee68c1 : SUCCESS in 6m 07s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/66381eb19902415ba0a1ec575504ec6a : FAILURE in 4m 15s