[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/de9703bc45a64958af0de1dcc70b94... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/4fa40ae563b242c9adfeaa6da2da0d0e : SUCCESS in 3m 32s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/195b9ce1134d4141bd644b2077155944 : FAILURE in 4m 39s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4241216952b2446daa82fbf8e445b789 : SUCCESS in 3m 46s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/555fb37521be46e8839f956f6a5858d1 : SUCCESS in 3m 43s