Get checksum actual record bytes #749

def getDataBytes(infile:String,outfile:String) :String ={
      val inputStream =new FileInputStream(new File(infile))
      val outStream =new FileOutputStream(new File(outfile))
      while (inputStream.available() > 0){
           val bdw = BigInt(IOUtils.toByteArray(inputStream,2))
           val bdwBuffer = Array.OfDim[Byte](bdw.toInt-2)
           IOUtils.read(inputSream,bdwBuffer)
           val block :Array[Byte] = bdwBuffer.drop(2)
           var rdw =0
           while (rdw < bdw -4) {
                 val rdwSize = BigInt(block.slice(rdw,rdw+2)).toInt
                 val record =block.slice(rdw+4, rdw+rdwSize)
                 outStream.write(record)
                 rdw = rdw + rdwSize
           }
     }
    inputStream.close()
   outStream.close()
}