[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/83b61939bd384d6390531171527bcf32 : SUCCESS in 7m 35s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/56824c211753496da1d4387e6d850114 : FAILURE in 6m 43s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/28fb269ae31044359f65210f4b7bbe24 : FAILURE in 7m 39s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c66a63d6425c4aaabdd7aec9b4cc1009 : FAILURE in 7m 18s