REFAC: modify tests after StreamingShrink refactoring

Testing/Code/Common/otbQuickLookImageGenerator.cxx

@@ -49,6 +49,8 @@ int otbQuickLookImageGenerator(int argc, char* argv[])
   filter->SetMaximumKernelWidth(atoi(argv[6]));
   filter->UseImageSpacing(atoi(argv[7]));
 
+  filter->Update();
+
   writer->SetInput(filter->GetOutput());
   writer->SetFileName(outputFileName);
 

Testing/Code/Visualization/otbImageLayerScalar.cxx

@@ -53,6 +53,7 @@ int otbImageLayerScalar(int argc, char * argv[])
   // Quicklook
   shrinker->SetInput(reader->GetOutput());
   shrinker->SetShrinkFactor(ssrate);
+  shrinker->Update();
 
   // new layer
   LayerType::Pointer layer = LayerType::New();

Testing/Code/Visualization/otbImageLayerVector.cxx

@@ -65,6 +65,7 @@ int otbImageLayerVector(int argc, char * argv[])
   // Quicklook
   shrinker->SetInput(reader->GetOutput());
   shrinker->SetShrinkFactor(ssrate);
+  shrinker->Update();
 
   // new layer
   LayerType::Pointer layer = LayerType::New();