Add test coverage of baremetal nodes policies
Add test coverage of baremetal nodes policies

Current tests do not have good test coverage of existing policies.
Either tests for policies do not exist or if they exist then they
do not cover the actual negative and positive testing.

To adopt the keystone's scope_type and new defaults in deprecated
API policies, we need to first write test coverage for the same to
know the complete effect of policies changes.

Partial implement blueprint policy-defaults-refresh-deprecated-apis

Change-Id: I5cea86d96418f625b69c9790594e1ceb0b83d5b5

mahak/nova,openstack/nova,openstack/nova,klmitch/nova,mahak/nova,klmitch/nova,klmitch/nova,openstack/nova,mahak/nova,klmitch/nova