ENH: remove explicit SetSeed in ListSampleGenerator.

Code/Learning/otbListSampleGenerator.txx

@@ -171,7 +171,7 @@ ListSampleGenerator<TImage, TVectorData>
   m_ClassesSamplesNumberTraining.clear();
   m_ClassesSamplesNumberValidation.clear();
 
-  m_RandomGenerator->SetSeed(1234); //FIXME switch to member
+  //m_RandomGenerator->SetSeed(1234); //FIXME switch to member
 
   TreeIteratorType itVector(vectorData->GetDataTree());
   itVector.GoToBegin();