[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/2819b524b0994bc3bf0be32214e417... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/22ffbdb330274d7cb46ecd3060d73682 : SUCCESS in 4m 49s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b2e5dac1b98d428c8b9a8c1501e59316 : SUCCESS in 6m 56s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4ec22258b20a491e8ea7cc87cc027de8 : SUCCESS in 4m 00s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/025875079cbc462cba8e98ae3987b7c4 : FAILURE in 4m 01s