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

Build failed. https://zuul.opendev.org/t/openstack/buildset/e6f265acc9544a158d0766d20f6d48... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/bda3905f765544649621d4bb7f22bf5f : SUCCESS in 4m 37s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/0643e9c970a841f0bc3d1e15d499caea : SUCCESS in 4m 36s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7393638620704060b4b7066576424a37 : SUCCESS in 4m 30s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3ec9954b982e44009475197fe3e37c6b : FAILURE in 4m 40s