[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/a252cbcf444e4b3588462948a4bd255a : SUCCESS in 8m 33s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/7e60791271c641c0917135e99620b5ca : FAILURE in 7m 55s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/e9f2b20aaea04138b251d409013239b4 : FAILURE in 8m 04s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/b0cb38d1c8df4e459db7876f2617e60c : FAILURE in 8m 08s