message: collision table v 1
diff: ClassImp(AliAnalysisTaskAO2Dconverter);
  const TString AliAnalysisTaskAO2Dconverter::TreeName[kTrees] = {
  - "O2collision",
  + "O2collision_001",
  "DbgEventExtra",
  "O2track",
  "O2trackcov",
  @@ -1327,8 +1327,8 @@ void AliAnalysisTaskAO2Dconverter::FillEventInTF()
  collision.fCovXX = AliMathBase::TruncateFloatFraction(covmatrix[0], mCollisionPositionCov);
  collision.fCovXY = AliMathBase::TruncateFloatFraction(covmatrix[1], mCollisionPositionCov);
  - collision.fCovXZ = AliMathBase::TruncateFloatFraction(covmatrix[2], mCollisionPositionCov);
  - collision.fCovYY = AliMathBase::TruncateFloatFraction(covmatrix[3], mCollisionPositionCov);
  + collision.fCovXZ = AliMathBase::TruncateFloatFraction(covmatrix[3], mCollisionPositionCov);
  + collision.fCovYY = AliMathBase::TruncateFloatFraction(covmatrix[2], mCollisionPositionCov);
  collision.fCovYZ = AliMathBase::TruncateFloatFraction(covmatrix[4], mCollisionPositionCov);
  collision.fCovZZ = AliMathBase::TruncateFloatFraction(covmatrix[5], mCollisionPositionCov);
  