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

Build failed. - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/b1f526122c5c40dc9de328b10178cdb5 : SUCCESS in 8m 20s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/9b47e4e282654e1ea69e55e22d0d5615 : FAILURE in 6m 57s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/eac315e511854ba893437aab68af1ee2 : FAILURE in 8m 08s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c707c006ca894e7f8387c75444e66f94 : FAILURE in 8m 59s