[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/6d0285e586ac4a8f8273dd153fab8fd4 : SUCCESS in 8m 34s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/b63220de24704b17a0b77526ea0853b5 : FAILURE in 8m 03s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/a0033bca423a4e3ea1ed54d68d1d69f0 : FAILURE in 9m 35s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/7e96bb826e2743eb83b659d3eee53a05 : FAILURE in 8m 56s