Ghanshyam Mann 3f1c1ed312 [goal] Deprecate the JSON formatted policy file
As per the community goal of migrating the policy file 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 documentation and release notes.

[1] https://governance.openstack.org/tc/goals/selected/wallaby/migrate-policy-format-from-json-to-yaml.html

Change-Id: I9ca5459a6968d93dee1bf24b3e0012a4cc7020b5
2021-01-28 16:37:30 +01:00
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