[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/35ec7fe6b3784b27a863d73829ad5eac : SUCCESS in 6m 53s - openstack-tox-py27 https://zuul.opendev.org/t/openstack/build/92ce3c6fda524a38822c9789d4a17970 : FAILURE in 6m 00s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/375c4bd64abf400bacb981da192cdb14 : FAILURE in 6m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/d99d554ca29b4085ad94b092e3a3acc1 : FAILURE in 6m 53s