[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/a669f7bd889f45698d7d4f908b0a73... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/f30e2c192eaf4dd09b661cb09be4cd0a : SUCCESS in 3m 47s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/8fd88d8e30fb4397aafd77f560f7448e : FAILURE in 4m 29s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/14af6b935b5e45e0992e63ededce6d41 : SUCCESS in 4m 08s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/08c278fef74c4d7e87497c5dccbd9dc1 : SUCCESS in 4m 00s