message: change name of the efficiency histogram
diff: AliAnalysisTaskBFR2sphero * AddTaskBFR2sphero
  (
  - TString AnalysisDataType = "MCAOD", // "RealData"; "MCAOD" for MC AOD truth; "MCAODreco"
  - TString prefixName = "truth_",
  + TString AnalysisDataType = "MCAODreco", // "RealData"; "MCAOD" for MC AOD truth; "MCAODreco"
  + TString prefixName = "reco_",
  //************ for Stage2_Step1 starts ************************
  int singlesOnly = 0, // 0: full correlations 1: singles only
  - int usePtEff = 0, // 0: no 1: yes
  + int usePtEff = 1, // 0: no 1: yes
  TString inputPtEffFileName = "alien:///alice/cern.ch/user/s/subhadee/inv_efficiency_correction_factor.root", ///alice/cern.ch/user/s/subhadee
  int chargeSet = 1, // 0: ++ 1: +- 2: -+ 3: --
  const char* taskname = "ChPM",// ChPM, ChPP, ChMM
  @@ -35,7 +35,7 @@ AliAnalysisTaskBFR2sphero * AddTaskBFR2sphero
  TString System = "pp18_V0_kMB_kFALSE",
  int CentralityGroup = 13, // Diff Cent Groups dealing w/ memory limit & weight file 100M Alien limit
  - int SpherocityGroup = 2, //spherocity groups
  + int SpherocityGroup = 1, //spherocity groups
  double zMax = 8., // set vertexZ cut
  double vZwidth = 0.5, // zMin, zMax & vZwidth determine _nBins_vertexZ.
  int trackFilterBit = 96, // PbPb10(Global=1;TPConly=128;Hybrid=272); pPb13(Global=?;TPConly=?;Hybrid=768); pp10(Global=1;TPConly=?; Hybrid=?)
  @@ -557,6 +557,7 @@ AliAnalysisTaskBFR2sphero * AddTaskBFR2sphero
  TString part2Name;
  TString partName;
  TString eventName;
  + TString eventName1;
  TString pileupRejecSuffix = "_PileupRejec";
  TString pairRejecSuffix = "_PairRejec";
  TString calibSuffix = "_calib";
  @@ -609,6 +610,12 @@ AliAnalysisTaskBFR2sphero * AddTaskBFR2sphero
  eventName += int(1000*maxSherocity[isphero] );
  + eventName1 = "_";
  + eventName1 += int(minCentrality[iCentrality] );
  + eventName1 += "Vo";
  + eventName1 += int(maxCentrality[iCentrality] );
  +
  +
  baseName = prefixName;
  baseName += part1Name;
  //baseName += "_";
  @@ -646,7 +653,7 @@ AliAnalysisTaskBFR2sphero * AddTaskBFR2sphero
  TString nameHistoBasePtEff = "hEff_";
  TString nameHistoPtEff;
  nameHistoBasePtEff += partName;
  - nameHistoBasePtEff += eventName;
  + nameHistoBasePtEff += eventName1;
  cout <<"\n\n\n nameHistoBasePtEff: "<<nameHistoBasePtEff<<endl;
  if (requestedCharge1 == 1)
  {
  