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

Build failed. https://zuul.opendev.org/t/openstack/buildset/d5c58ab90b3743a6811fe2cc8306ab... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/3af5dd68375940d3ae67c5beb1821eb7 : SUCCESS in 4m 32s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f26e86feb31d4b0d804aba3260e91179 : SUCCESS in 5m 31s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/048307bdbded4677a51ece30b957c7b2 : SUCCESS in 5m 35s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/05e8bb81e8c04a55b2001fee01c7a4fd : FAILURE in 5m 08s