Produce CaloHit to MC particle relation collection (#170)

* Create CaloHit to MC particle relation collection at the end of the reconstruction.

Author: dudarboh

StandardConfig/production/HighLevelReco/HighLevelReco.py

@@ -205,6 +205,7 @@
 MyRecoMCTruthLinker = MarlinProcessorWrapper("MyRecoMCTruthLinker")
 MyRecoMCTruthLinker.ProcessorType = "RecoMCTruthLinker"
 MyRecoMCTruthLinker.Parameters = {
+    "CalohitMCTruthLinkName": ["CalohitMCTruthLink"],
     "ClusterCollection": ["PandoraClusters"],
     "ClusterMCTruthLinkName": ["ClusterMCTruthLink"],
     "FullRecoRelation": ["true"],

StandardConfig/production/HighLevelReco/HighLevelReco.xml

@@ -174,6 +174,8 @@
     <parameter name="MCParticleCollection" type="string" lcioInType="MCParticle"> MCParticle </parameter>
     <!--Name of the ReconstructedParticles input collection-->
     <parameter name="RecoParticleCollection" type="string" lcioInType="ReconstructedParticle"> PandoraPFOs </parameter>
+    <!--Name of the updated calo-hit MCTruthLink output collection - not created if empty()-->
+    <parameter name="CalohitMCTruthLinkName" type="string" lcioOutType="LCRelation"> CalohitMCTruthLink </parameter>
     <!--Name of the Cluster collection -->
     <parameter name="ClusterCollection" type="string" lcioInType="Cluster"> PandoraClusters </parameter>
     <!--Name of the Tracks input collection-->