This commit migrate all action policies into code [1]. Like oslo.config, with oslo.policy, we can define all of default rules in code base and only change some rules via policy file. Another thing that we should use yaml format instead of json format. [1] https://governance.openstack.org/tc/goals/queens/policy-in-code.html Co-authored-By: Dai Dang-Van <daidv@vn.fujitsu.com> Change-Id: I42a77408124666ac54909d858b4db74908460176