Changes to Retrieve details of a provisioned thing from the AWS IoT Device Registry

added the media type application/vnd.aws-cdf-v1.0+json for the response with the status 200

added the media type application/vnd.aws-cdf-v1.0+json for the response with the status 400

added the media type application/vnd.aws-cdf-v1.0+json for the response with the status 404