Fix RICH QMT test options for MC decoding

Rich/RichFutureRecSys/tests/options/rich-dst-reco.py

@@ -136,10 +136,8 @@ if not useMCHits:
         ]
 else:
     from Configurables import Rich__Future__MC__DecodedDataFromMCRichHits as RichMCDecoder
-    richMCDecode = RichMCDecoder("RichDecodeFromMC")
-    richMCDecode.IsDetDescMC = isDetDescMC
-    richMCDecode.RejectBackground = False
-    richMCDecode.IncludeTimeInfo = is4D
+    richMCDecode = RichMCDecoder(
+        "RichDecodeFromMC", IsDetDescMC=isDetDescMC, IncludeTimeInfo=is4D)
     all.Members += [richMCDecode]
 
 # DataType