[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/f891ed10274a46a2a0ef6590258c5e... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ffc4874b6d5b4d3d9f143f77d393b7c1 : SUCCESS in 3m 25s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/3ce692fff3f0408185314e0e4e69dbf4 : FAILURE in 4m 36s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/aead8d4da0ce449b974e39926e0a3b1f : SUCCESS in 6m 35s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/00f7cc1eed6d4c3fb217b4e3379ceb41 : SUCCESS in 3m 54s