[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/ca40303f0b3b4f4297032dfc0f5365... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/76ae4676eb2144d7b32393c0c23dad94 : SUCCESS in 3m 59s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f093736ab62445c6ac2dd7b6fc644f30 : FAILURE in 4m 39s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4531013e798640edbd735acae354e8d4 : SUCCESS in 3m 15s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/2fdfb7e0efde48d480e9530362716210 : SUCCESS in 3m 41s