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

Build failed. https://zuul.opendev.org/t/openstack/buildset/28db7e845af049b8a54ef82e538331... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/bdf0b71ecab048cf8e6747268d9099b8 : SUCCESS in 6m 01s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/80bacb4552bd4a48a4e6cfd071227117 : SUCCESS in 5m 07s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/7355a167b462413ab866150f70edbfda : SUCCESS in 4m 08s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b2c0cdf0adf341b5aefbe7de39430591 : FAILURE in 5m 46s