private List<TestInstanceInfo> populateTestInstances(List<Long> testsetIds)
   {
      try {
         if (testsetIds != null && !testsetIds.isEmpty()) {
            testInstances = qcConnector.getTestInstances(testsetIds);
            if (testInstances != null && !testInstances.isEmpty()) {
               log.info("Got test instances for testset :" + testsetIds);
            } else {
               log.warn("No test instances found for testset :" + testsetIds);
            }
         }
      } catch (Exception ex) {
         log.error("Got an exception while fetching testInstances from QC for testset :"
                           + testsetIds, ex);
      }
      return testInstances;
   }