[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/055a3e4754f74fd7a30d8d2509fc79... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8be33822163344a4a206ab0909b504e1 : SUCCESS in 3m 55s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/e153b7707521428db68e7b79104fd1da : SUCCESS in 4m 44s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/52f524311ae345cb9da447428f9cb7f4 : SUCCESS in 5m 37s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/ef0437d59d604a32926dd8475d3cbce7 : FAILURE in 4m 08s