Discrepancy between APIs and Open Api spec

[Aescwine]

Issue description

There appears to be a discrepancy between the content-type that APIs accept and what the Open Api spec has defined. Not a big issue, but when building an API client it will be good to know if I should be sticking with a form-data request body for now.

Expected behavior

POST requests to the query and proofs:get APIs should accept a request body of content type application/json

Actual behavior

Only form-data is accepted.

Steps to reproduce the problem

1. Send a request to query and proofs:get with a request body of application/json, ot-node can't process. Only multipart/form-data looks to be accepted.

Specifications

• Node version: v6/release/testnet branch

Contact details

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