[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/3cffd4209a1442eb9a76c3cf0ad60d... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/9b6cf4ac76f14d26ac25435926d30d20 : SUCCESS in 3m 37s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/3ae7059b85b74464b7b0c9e45f1c8ee9 : FAILURE in 5m 04s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/aa4984f61d054700b388614265187592 : SUCCESS in 3m 22s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/bcf400740a624d80b796d6274890181b : SUCCESS in 3m 37s