ENH: remove DoFastSegmentation(true) to ensure reproductible results

include/lsgrmGraphOperations.txx

@@ -86,7 +86,7 @@ MergeAllGraphsAndAchieveSegmentation(
   segmenter.SetNumberOfComponentsPerPixel(imageBands);
   segmenter.SetParam(params);
   segmenter.SetThreshold(threshold);
-  segmenter.SetDoFastSegmentation(true);
+  segmenter.SetDoFastSegmentation(false); // was true
   segmenter.SetNumberOfIterations(numberOfIterations);
 
   grm::GraphOperations<TSegmenter>::PerfomAllIterationsWithLMBFAndConstThreshold(segmenter);