fix IntraServiceITest.compositeTest

Had to make a couple changes. In HandlerUtils.readCf I added another check for the name or value being a ByteBuffer after type conversion which happens in the case of composites. The ByteBuffer has to get converted to a byte[] before getting stored in a JsonObject. Then in the test code I had to refactor the compositeTest method a bit to decode the bytes and put them back into a ByteBuffer.