Test for DecayTreeFitterAlg

Test for DecayTreeFitterAlg and subsequent functors. Based on Phys!970 (merged) and Rec!2504 (merged)

DaVinciTests/tests/options/DVTestFunctors.py

@@ -34,7 +34,7 @@ def make_tight_d2kk():
     print("### Kaons are {0}".format(kaons))
 
     filtered_kaons = ParticleRangeFilter(
-        Input=kaons, Cut=F.FILTER(F.PID_K > 2.))
+        Input=kaons, Cut=F.FILTER(F.PROBNN_K > 0.5))
     p = TwoBodyCombiner(
         name="TightD02KK",
         Input1=filtered_kaons,