[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/e3305365415945678b3ddc766fcc35... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3741159610f14dc387df6464691c1d9a : SUCCESS in 4m 07s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/560ced0c918a474a8d68c561289f4c41 : FAILURE in 6m 11s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/501c4698a8b2486f9351553ce513b32e : SUCCESS in 4m 01s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/cd1d696308504fc1b4e539a57ed10a34 : SUCCESS in 5m 25s