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

[ROCm/rccl commit: f6f5e16fe6]

projects/rccl/test/test_AllReduce.cpp

@@ -14,7 +14,7 @@ namespace CorrectnessTests
 
     // Prepare input / output / expected results
     Dataset dataset;
-    dataset.Initialize(numDevices, numElements, dataType, inPlace);
+    dataset.Initialize(numDevices, numElements, dataType, inPlace, ncclCollAllReduce);
     FillDatasetWithPattern(dataset);
     ComputeExpectedResults(dataset, op);