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

Build failed. https://zuul.opendev.org/t/openstack/buildset/27b5f23ea6c14491806c51d009e19d... - openstack-tox-docs https://zuul.opendev.org/t/openstack/build/ac19713451b146c2a874d2edf823f1db : SUCCESS in 14m 53s - openstack-tox-py36 https://zuul.opendev.org/t/openstack/build/feabf68acf7745f785338bf99ba1527e : FAILURE in 12m 44s - openstack-tox-py37 https://zuul.opendev.org/t/openstack/build/3243db26522446fb853bd276033a1622 : SUCCESS in 12m 43s