j2k: flatten test cases and testData directory structure

Move j2k/test/tests -> j2k/tests, j2k/test/testData -> j2k/testData

j2k/testData/fileOrElement/constructors/parameterModification.java

@@ -0,0 +1,27 @@
+class C {
+    private int field;
+
+    C(int arg1, int arg2, int arg3) {
+        arg1++;
+        System.out.print(arg1 + arg2);
+        field = arg3;
+        arg3++;
+    }
+
+    C(int arg1, int arg2) {
+        this(arg1, arg2, 0);
+        arg2++;
+    }
+
+    C(int arg1) {
+        this(arg1, 0, 0);
+    }
+}
+
+public class User {
+    public static void main() {
+        C c1 = new C(100, 100, 100);
+        C c2 = new C(100, 100);
+        C c3 = new C(100);
+    }
+}