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

Build failed. https://zuul.opendev.org/t/openstack/buildset/24e8e979d5a14e82a8666b7eb1680d... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/6b241b1c066245b78bc760669dbea0d1 : SUCCESS in 14m 12s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/8bcf1bdb7a7a415e86875da929d7c443 : FAILURE in 13m 22s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/16d6cc5508e24450a801bdb23fc93046 : SUCCESS in 14m 24s