[Openstack-stable-maint] Stable check of openstack/oslo.versionedobjects for ref refs/heads/stable/train failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/c50a43416f264176beb9b84fe2b051... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/01f73c4b0e26485d8b2996f6a19b4f19 : SUCCESS in 4m 02s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/0ff985b06e3c4920a389f50bbd8fa852 : FAILURE in 2m 34s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/edfebe9604e34d5ab6dc1cf87da30a0b : SUCCESS in 3m 23s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/02d2703d5fd74b9793fcff0350ecff21 : SUCCESS in 4m 09s