Java: Address review comment. Fix dataflow model

java/ql/test/library-tests/dataflow/kdf/test.ql

@@ -1,24 +1,3 @@
-import java
-import semmle.code.java.dataflow.TaintTracking
-
-module Config implements DataFlow::ConfigSig {
-  predicate isSource(DataFlow::Node n) {
-    exists(ArrayAccess aa |
-      aa.getArray().(VarAccess).getVariable().hasName("args") and
-      n.asExpr() = aa
-    )
-  }
-
-  predicate isSink(DataFlow::Node n) {
-    exists(MethodCall ma |
-      ma.getMethod().hasName("sink") and
-      n.asExpr() = ma.getAnArgument()
-    )
-  }
-}
-
-module Flow = TaintTracking::Global<Config>;
-
-from DataFlow::Node src, DataFlow::Node sink
-where Flow::flow(src, sink)
-select src, sink
+import utils.test.InlineFlowTest
+import TaintFlowTest<DefaultFlowConfig>
+import TaintFlow::PathGraph