code: private Put getJobCostPut(Double jobCost, JobKey jobKey) {
      Put pJobCost = new Put(jobKeyConv.toBytes(jobKey));
      pJobCost.addColumn(Constants.INFO_FAM_BYTES, Constants.JOBCOST_BYTES,
          Bytes.toBytes(jobCost));
      return pJobCost;
    }
docs: generates a put for the job cost
  @param jobCost
  @param jobKey
  @return the put with job cost