[Openstack-stable-maint] Stable check of openstack/keystone for ref refs/heads/stable/ussuri failed

Build failed. https://zuul.opendev.org/t/openstack/buildset/febc67bc5d8744658ea9902fd3363e... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/fc8296b8bc5248c08ddceb7d2e572de0 : SUCCESS in 16m 00s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/da113ce328a94ffcae76d2803c686980 : FAILURE in 13m 28s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/19f0988bc6e14028af1896416bf33025 : SUCCESS in 12m 40s