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

Build failed. https://zuul.opendev.org/t/openstack/buildset/e9f3fdf01f57493c827b5728c0625a... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/7848a502c85b4ffea620297647990131 : SUCCESS in 3m 38s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/3e1993fe45754d43b9ebf55655b5b227 : RETRY_LIMIT in 1m 41s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/56a766fb64eb4c018480de83d13b36bb : SUCCESS in 3m 57s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/15e5a84362d14d04bcb008c1faae176b : SUCCESS in 3m 01s