[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/e0c46b58635d471e8983b1e4f16c2ca1 : SUCCESS in 7m 26s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b5de2cf8379b4e7b806709c5631899e5 : FAILURE in 6m 27s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/bf313539bae4407f8bdd6968832bc124 : FAILURE in 9m 07s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/e54ee9b009564f7686a9e430f700c588 : FAILURE in 6m 49s