message: Update AliPythia8 such that it supports Angantyr
diff: @@ -582,11 +582,22 @@ void AliPythia8::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfu
  case kPyBeautyJets:
  case kPyMbAtlasTuneMC09:
  break;
  + case kPyAngantyr:
  + //Some standard initializations
  + ReadString("Beams:idA = 1000822080");
  + ReadString("Beams:idB = 1000822080");
  + ReadString("HeavyIon:SigFitNGen = 0");
  + ReadString("HeavyIon:SigFitDefPar = 13.88,1.84,0.22,0.0,0.0,0.0,0.0,0.0");
  + ReadString("HeavyIon:bWidth = 14.48");
  }
  //
  // Initialize PYTHIA
  // SetMSTP(41,1); // all resonance decays switched on
  + if(fProcess!=kPyAngantyr){
  Initialize(2212, 2212, fEcms);
  + }else{
  + Initialize(1000822080, 1000822080, fEcms);
  + }
  }
  void AliPythia8::SetSeed(UInt_t seed)
  