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

Build failed. https://zuul.opendev.org/t/openstack/buildset/2aaf0a64f1574f609c720702c0d2bc... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6f26916fff084f2884906a06cdbc5467 : RETRY_LIMIT in 9s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/ba6773f2acac4fc09c315ede9f588c64 : RETRY_LIMIT in 3s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/147e2d8f8c0e494b99787304543ae2e4 : RETRY_LIMIT in 3s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/eab9408527d847689f7a4b9be228374d : RETRY_LIMIT in 1s