@Override
    public void render(OutputStream outputStream) throws IOException {
        try (InputStream inputStream = file.createInputStream()) {
            inputStream.transferTo(outputStream);
        }
    }
Represents a response for a request to read contents of a file.

@author Ulf Lilleengen
configserver/src/main/java/com/yahoo/vespa/config/server/http/SessionContentReadResponse.java