[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/ff4203aeb26f432ea1ef95279b8ee6... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/cb8ba258b29343c590b7a38f126785d7 : SUCCESS in 4m 15s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c7a81599e6a7417c9fea23e56348a5c3 : FAILURE in 3m 32s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/2f49988407164424a61509c98ba6b0c2 : SUCCESS in 3m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/bf014155a1364c5589a5b58338a30653 : SUCCESS in 4m 25s