This commit uses the existing policy-in-code module to move all
default policies for magnum service and stat into code. This commit
also adds helpful documentation about each API those policies protect,
which will be generated in sample policy files and completely remove
usage of policy.json file.
Co-authored-By: Dai Dang-Van <daidv@vn.fujitsu.com>
Implements: blueprint policy-in-code
Change-Id: I01a8ce964bf8bd569d4aa4e899cbcd9855281835