Read/Write/Decor handles for TauTruthMatchingWrapper

This provides R/W/D handles for TauTruthMatchingWrapper as part of the effort to prepare the derivation framework for AthenaMT running. Although this should be sufficient for this tool, it calls another tool (TauTruthMatchingTool) which does decoration without context-aware decorators. This will also have to be migrated.

PhysicsAnalysis/DerivationFramework/DerivationFrameworkTau/DerivationFrameworkTau/TauTruthMatchingWrapper.h

 /*
-  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
 */
 
 ///////////////////////////////////////////////////////////////////
@@ -16,6 +16,8 @@
 #include "DerivationFrameworkInterfaces/IAugmentationTool.h"
 #include "GaudiKernel/ToolHandle.h"
 #include "TauAnalysisTools/ITauTruthMatchingTool.h"
+#include "StoreGate/ReadHandleKey.h"
+#include "xAODTau/TauJetContainer.h"
 
 /**
  * wrapper tool for tau truth matching 
@@ -32,11 +34,13 @@ namespace DerivationFramework {
       virtual StatusCode addBranches() const;
 
     private:
-      std::string m_tauContainerName;
+      SG::ReadHandleKey<xAOD::TauJetContainer> m_tauKey
+         {this, "TauContainerName", "TauJets", "ReadHandleKey for input TauJetContainer"};
+
 
       ToolHandle < TauAnalysisTools::ITauTruthMatchingTool > m_tTauTruthMatchingTool;
 
   }; 
 }
 
-#endif // DERIVATIONFRAMEWORK_TAUPVTRKSELECTIONTOOL_H
+#endif