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

Build failed. https://zuul.opendev.org/t/openstack/buildset/94e5e638601643dea46d2fbe617aef... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/aa8d74bf99c74a18921a01e193f12555 : FAILURE in 3m 08s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/4845ad657a014157a1639ebc910d868b : FAILURE in 2m 56s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/57600db4af264c40b5f6f113818f9db0 : FAILURE in 5m 07s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/0c2dda6e08864113bb5752fbeffec888 : FAILURE in 2m 41s