[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/2372792795354edc99c91c578e9bf4... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/28332e5bc4564994b8a9f9e6d023f142 : SUCCESS in 3m 30s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/2c0cd671b5dd47468ce68370f3031165 : FAILURE in 3m 19s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8b096db38d61476cbdc8325aee670e7c : SUCCESS in 3m 15s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/9c3d49ff90984ecaaa3b5c862c437b0e : SUCCESS in 4m 18s