Add LB mu writer to decorate EventInfo in JetRecTestCfg

JetCalibTool now requires the EventInfo decorations, so it's necessary to add the LB mu writer at least to run on Run 2 AODs.

Might need some better testing to be future-proof, but this still seems to be under development.

@jbossios, be aware that it's now a bit of a pain to test JetCalibrationTool in master on older samples.

@chala, this seems to get the script running again.

Reconstruction/Jet/JetRecConfig/python/ConstModHelpers.py

@@ -51,7 +51,7 @@ ConstModConfigs = {
     "SK":     {}
 }
 
-def getConstitModAlg(constit,suffix="",tvaKey="JetTrackVtxAssociation",vtxKey="PrimaryVertices"):
+def getConstitModAlg(constit,suffix="",tvaKey="JetTrackVtxAssoc",vtxKey="PrimaryVertices"):
     inputtype = constit.basetype
 
     # Need to extend to TCC