Roles constants were initialized before the configuration file was
parsed. The result was that default values were always used. This commit
moves roles constants initialization to the modules where they are used.
Change-Id: I87406c320e5a403126a9c9c9a258390851f50056
Story: 2002541
Task: 22099
Added policies and used policy enforcement engine
from monasca-common.
- Replaced security with oslo.policy
- Updated unit tests and implemented some new tests
- Added a new entry point for generating sample policy file by tox
story: 2001233
task: 6355
Change-Id: I4aa444fe6ec883160c03c201145c77994b6615f9
Signed-off-by: Amir Mofakhar <amofakhar@op5.com>