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

Build failed. https://zuul.opendev.org/t/openstack/buildset/963536188584436d8a143cd3089c9f... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ed8a77c8bf9741769577ccc8a9a094ec : FAILURE in 2m 25s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/af7a4264e5da4e1c870c9a8f389f1f93 : FAILURE in 2m 28s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/ce1cec945e3341c081e288553083b68c : FAILURE in 2m 21s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/09899d84273c4297ad59a9be98904659 : FAILURE in 2m 39s