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

Build failed. https://zuul.opendev.org/t/openstack/buildset/a3a13a5c038b48898efcd22d5d41e5... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/db00dd47de79493fbd50bc1031482b7c : FAILURE in 4m 35s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/1e67f150f7da44f28667f9fe44b9c9ec : FAILURE in 3m 25s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a00f30813ffe409693151ae399f882b8 : FAILURE in 4m 01s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/89caf3ee740c4781ae4ed292d0ca3fe0 : FAILURE in 4m 28s