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

Build failed. https://zuul.opendev.org/t/openstack/buildset/91fbac60a1e641a8ac8e6cabd941df... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/66d0509e4c6c49d9beff294a3b1a94da : SUCCESS in 13m 03s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/cba25c58e96b48d2b8cb12ae079bb85c : SUCCESS in 14m 37s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/d366466b2529413e8a5e656b0dc12b5e : FAILURE in 12m 11s