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

Build failed. https://zuul.opendev.org/t/openstack/buildset/10d03b2c258f402c81693558725d2b... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ee32c55e20794f089d6641b55d232363 : SUCCESS in 5m 13s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/f92d7dbb3d304f1496baaff30a410492 : SUCCESS in 6m 01s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/945ae5b2a1b44796bd11ff9897edd48c : SUCCESS in 6m 49s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/ac5f10e3419e4a0096240c407102d5d3 : FAILURE in 5m 10s