This patch modifies the following for the API Documentation for v2 API:
[1] Added 400 code
- All APIs return "400 Bad Request" if the validation check in the
Version header fails.
[2] Added 406 code
- All APIs except api_versions return "406 Not Acceptable" if an
unsupported version is set in the Version header.
[3] Removed 422 code
- It is not necessary to describe the "422 Unprocessable Entity"
error that occurs after returning "202 Accepted" in the response.
Change-Id: I8565c12a69ca75f6c7934e351b5f76ca093ffb02
0e3793b1a2