[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/6de1f44d1d734716a201618b254344... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/1b972322f4f54c6baebb71096c11c57c : SUCCESS in 3m 49s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/48d6aac34bf8416a8b7a5a9a63329a3c : SUCCESS in 4m 45s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2fdae3a6673d4232a9e13f985901cd43 : SUCCESS in 4m 54s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/f6d4a3e61ff344a7932e8da6477cde0c : FAILURE in 4m 36s