[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/3628b19f8c0e4c4a8ae6645221a812... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6ff9d9ba8691460c8db5f51ed9185417 : SUCCESS in 3m 27s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/758716450a4b4ecf806f5b2c3adba063 : FAILURE in 4m 49s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/dafa4b4dd0c646fd9f02f2deb5f41bf3 : SUCCESS in 2m 52s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/6189ed2c220948e5810b15b7d16e303e : SUCCESS in 6m 25s