j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/list/ForEach.java

@@ -0,0 +1,15 @@
+//file
+import java.util.*;
+
+public class ForEach {
+    public void test() {
+        ArrayList<Object> xs = new ArrayList<Object>();
+        List<Object> ys = new LinkedList<Object>();
+        for (Object x : xs) {
+            ys.add(x);
+        }
+        for (Object y : ys) {
+            xs.add(y);
+        }
+    }
+}