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

Build failed. https://zuul.opendev.org/t/openstack/buildset/c479b5b54d1243e8bd7a5e318c642e... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/805a850f855e44679066c91b2e496960 : SUCCESS in 13m 09s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/f9a8a5c90d2c432390c61000ff4c6bdf : RETRY_LIMIT in 1m 40s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/586e23e6effa401eb01d623a14c12ad9 : SUCCESS in 13m 24s