message: change the order between two tasks
diff: #pragma link off all classes;
  #pragma link off all functions;
  +#pragma link C++ class AliAnalysisTaskQuarkoniumTreeMC+;
  #pragma link C++ class AliAnalysisTaskTree_MCut+;
  #pragma link C++ class AliAnalysisTaskPbPbTree_MCut+;
  -#pragma link C++ class AliAnalysisQuarkoniumTreeMC+;
  #endif
  