As per the community goal of migrating the policy file
the format from JSON to YAML[1], we need to do two things:
1. Change the default value of '[oslo_policy] policy_file''
config option from 'policy.json' to 'policy.yaml' with
upgrade checks.
2. Deprecate the JSON formatted policy file on the project side
via warning in doc and releasenotes.
Also replace policy.json to policy.yaml ref from doc and tests.
[1]https://governance.openstack.org/tc/goals/selected/wallaby/migrate-policy-format-from-json-to-yaml.html
Change-Id: I9028875399b54ab961ae46ca13f9cf6e6fc7ad89
Based upon the established conf paradigm used in Nova,
this patch moves the configuration to a central location.
Making config a lot easier to manage, as well a lot easier
to locate.
Additional changes
* Fixed missing notification section in example config.
* Moved external configs to generator config (e.g. osprofiler)
Change-Id: I8bca356768bd710d28361b50754ddcc249a32428
Ghanshyam Mann