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

Build failed. https://zuul.opendev.org/t/openstack/buildset/b7b8bff4bbe5408cbc65566c14c047... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6e8cd2c625774391add22335ae5f4c0d : FAILURE in 3m 22s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/5d56fa545efa43c4bf1018bcf3d7c4f9 : SUCCESS in 3m 02s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/4e74678be9c64780860c10abdc1808a5 : SUCCESS in 2m 59s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/468256db8203442690cd1a8a86d5fdf5 : SUCCESS in 3m 25s