This commit migrate all client policies into code [1] and
also remove policy.json usage file completely.
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: I7c7fd83aa2516c053e38d7598cf79e63401f7519
ae388911e0