[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/7e5b96aec819460392b5dd5c867e08... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/4335ea128fdc4ae4b407f5d95e475fce : SUCCESS in 3m 33s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ebe7875ce9954093a4bf1bd044419ffb : FAILURE in 2m 50s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/6e7f135a540842fea39565eb2d068bde : SUCCESS in 2m 52s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/896a2bb2785f411c9d69298a711350fe : SUCCESS in 4m 44s