[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/0e727a8836a44558935b1bc5473a9c... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/8f2048b7a7384d38a39d9cd7730df543 : SUCCESS in 3m 04s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/71848523378c4a7bbade49acad71091e : FAILURE in 3m 32s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/75af62da7cad4015ad0fc5ffa072225e : SUCCESS in 3m 22s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/bead97a34a464c68bbc48c1e5fe8cf81 : SUCCESS in 3m 21s