MuonSimHit - Add prefixes to the sim hit Identifiers

Avoids type race conditions in the xAOD.

MuonSpectrometer/MuonPhaseII/Event/xAOD/xAODMuonSimHit/Root/xAODMuonSimHitAuxContainer_v1.cxx

@@ -6,21 +6,29 @@
 #include "xAODCore/AuxStoreAccessorMacros.h"
 // Local include(s):
 #include "xAODMuonSimHit/versions/MuonSimHitAuxContainer_v1.h"
-
+namespace{
+    static const std::string preFixStr{"MuSim_"};
+}
+#define SIM_AUXVARIABLE(VAR) \
+   do { \
+      static const std::string varName =preFixStr+#VAR; \
+      static const auxid_t auxid = getAuxID(varName, VAR); \
+      regAuxVar(auxid, varName, VAR); \
+    } while (false);
 namespace xAOD {
 MuonSimHitAuxContainer_v1::MuonSimHitAuxContainer_v1()
     : AuxContainerBase() {
     AUX_MEASUREMENTVAR(localPosition, 3);
     AUX_MEASUREMENTVAR(localDirection, 3);
-    AUX_VARIABLE(stepLength);
-    AUX_VARIABLE(globalTime);
-    AUX_VARIABLE(pdgId);
-    AUX_VARIABLE(identifier);
-    AUX_VARIABLE(energyDeposit);
-    AUX_VARIABLE(kineticEnergy);
-    
-    AUX_VARIABLE(mcEventIndex);
-    AUX_VARIABLE(mcBarcode);
-    AUX_VARIABLE(mcCollectionType);
+    SIM_AUXVARIABLE(stepLength);
+    SIM_AUXVARIABLE(globalTime);
+    SIM_AUXVARIABLE(pdgId);
+    SIM_AUXVARIABLE(identifier);
+    SIM_AUXVARIABLE(energyDeposit);
+    SIM_AUXVARIABLE(kineticEnergy);    
+    SIM_AUXVARIABLE(mcEventIndex);
+    SIM_AUXVARIABLE(mcBarcode);
+    SIM_AUXVARIABLE(mcCollectionType);
 }
-}  // namespace xAOD
\ No newline at end of file
+}  // namespace xAOD
+#undef SIM_AUXVARIABLE
\ No newline at end of file