TUT: use foamDictionary without runApplication wrapper

- avoids generating a log file, which is missing an "End" tag that
  allows the test loop to identify the completion status

tutorials/incompressible/simpleFoam/turbulentFlatPlate/Allrun

@@ -35,7 +35,8 @@ then
     do
         echo "Processing model: $model"
 
-        runApplication -s $model foamDictionary -entry RAS.RASModel -set $model constant/turbulenceProperties
+        foamDictionary -entry RAS.RASModel -set "$model" \
+            constant/turbulenceProperties > /dev/null
 
         for i in "${!grading_vs_yp[@]}"
         do