message: Changed AddTaskGFWFlow macro so it's complient with root 6
diff: -class AliAnalysisDataContainer;
  +#include "AliAnalysisDataContainer.h";
  class TNamed;
  AliAnalysisTaskGFWFlow* AddTaskGFWFlow(TString name = "name", Bool_t ProduceWeights=kFALSE, Bool_t IsMC=kFALSE, Bool_t IsTrain=kTRUE, Bool_t AddQA=kFALSE, TString weightpath="", TString centMap="", TString subfx="")
  {
  @@ -26,12 +26,12 @@ AliAnalysisTaskGFWFlow* AddTaskGFWFlow(TString name = "name", Bool_t ProduceWeig
  if(!ProduceWeights) {
  if(IsTrain) {
  - if(centMap.IsNull()) AliFatal("Centrality map not specified!\n");
  + if(centMap.IsNull()) return 0; //AliFatal("Centrality map not specified!\n");
  if(centMap.Contains("alien:")) TGrid::Connect("alien:");
  TFile *tf = TFile::Open(centMap.Data());
  TH1D *cmap = (TH1D*)tf->Get("AMPT_Cent_Map")->Clone("AMPT_Cent_Map");
  cmap->SetDirectory(0);
  - if(!cmap) AliFatal("Could not find AMPT_Cent_Map in file specified!\n");
  + if(!cmap) return 0;//AliFatal("Could not find AMPT_Cent_Map in file specified!\n");
  AliAnalysisDataContainer *cInMap = mgr->CreateContainer("CentralityMap",TH1D::Class(),AliAnalysisManager::kInputContainer);
  cInMap->SetData(cmap);
  mgr->ConnectInput(task,1,cInMap);
  