Changes to Get OP Discovery Configuration

added the new required request property op_configuration_endpoint

the request property op_host became optional

request property op_discovery_path deprecated

request property op_host deprecated

added optional request body

added the media type application/json for the response with the status 200

added the media type application/json for the response with the status 400

added the media type application/json for the response with the status 403

added the media type application/json for the response with the status 500

endpoint added

api path removed without deprecation