[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/10837690eea74ea48366bea8f37e5d66 : SUCCESS in 7m 48s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/76dbf2b12fdf4a5192771576b2e3226c : FAILURE in 8m 08s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8e1f6d3e6fd141548488cd75f4992992 : FAILURE in 8m 41s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/c6e6c94a60444452ad2359d4d0ebd75c : FAILURE in 8m 27s