Fixing bug with ExtractSubDataset function not fully initializing subdataset (#390)

test/test_AllReduceAbort.cpp

@@ -30,7 +30,7 @@ namespace CorrectnessTests
 
         // Prepare input / output / expected results
         Dataset dataset;
-        dataset.Initialize(numDevices, numElements, dataType, inPlace);
+        dataset.Initialize(numDevices, numElements, dataType, inPlace, ncclCollAllReduce);
         FillDatasetWithPattern(dataset);
 
         int gpu = 0; // GPU number to trigger abort