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

Build failed. https://zuul.opendev.org/t/openstack/buildset/a8f47a163a374644acce04ee9bb0ec... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/a288997be6d345fc843edda17810ed5d : SUCCESS in 5m 02s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/cb21ca4dc91a46b996c8abc7039b5991 : SUCCESS in 4m 46s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/6acce6977cb44d9eb910817d97b09d9e : SUCCESS in 4m 23s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/547565de1a984117b0e98ad35cdd73ad : FAILURE in 4m 41s