[Openstack-stable-maint] Stable check of openstack/oslo.service for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/de92047d5ce54f81bf8645756ea9f7... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/868b5ab6afaa48b0be6c6644a429f151 : SUCCESS in 4m 39s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/d370969bc6d54f1fabdde7c4f0703e89 : FAILURE in 3m 38s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/b6b924fb1e394f10be5baa94c33a3de9 : SUCCESS in 4m 42s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/df19c08f65944f429407e22018870e8b : SUCCESS in 3m 29s