
Because usage of json for policy file will be deprecated and replaced by yaml[1]. [1] https://governance.openstack.org/tc/goals/selected/wallaby/migrate-policy-format-from-json-to-yaml.html Depends-on: https://review.opendev.org/769647 Change-Id: Ic94584b92fdd3f1b3dc76a46d93ddff8d725e6db