[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/7c29783e141640469872f536aa1beff6 : SUCCESS in 7m 25s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/c8f15798341641a2bda3fd564411f4a9 : FAILURE in 5m 37s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/9e60fccd64d14a88bb3c318983627b61 : FAILURE in 6m 35s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b24bb6247be54ea7b161816a211ab8fd : FAILURE in 7m 04s