[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/0cfaee229add4a98b6073207f71c22... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/0fb4b724f9a643e5b05a8123605dd878 : SUCCESS in 4m 25s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/5ff9fe43994447da897aac345cbf8b24 : FAILURE in 4m 05s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/000b59742c02439b927db5e5cb4b5c06 : SUCCESS in 3m 54s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/394e5664f9794c299739b14e310e2654 : SUCCESS in 3m 42s