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);
+        }
+    }
+}

j2k/testData/fileOrElement/list/ForEach.kt

@@ -0,0 +1,15 @@
+// ERROR: Unresolved reference: LinkedList
+import java.util.*
+
+public class ForEach {
+    public fun test() {
+        val xs = ArrayList<Any>()
+        val ys = LinkedList<Any>()
+        for (x in xs) {
+            ys.add(x)
+        }
+        for (y in ys) {
+            xs.add(y)
+        }
+    }
+}

j2k/testData/fileOrElement/list/Lists.java

@@ -0,0 +1,15 @@
+//file
+import java.util.*;
+
+public class Lists {
+    public void test() {
+        List<Object> xs = new ArrayList<Object>();
+        List<Object> ys = new LinkedList<Object>();
+        ArrayList<Object> zs = new ArrayList<Object>();
+        xs.add(null);
+        ys.add(null);
+        xs.clear();
+        ys.clear();
+        zs.add(null);
+    }
+}

j2k/testData/fileOrElement/list/Lists.kt

@@ -0,0 +1,15 @@
+// ERROR: Unresolved reference: LinkedList
+import java.util.*
+
+public class Lists {
+    public fun test() {
+        val xs = ArrayList<Any>()
+        val ys = LinkedList<Any>()
+        val zs = ArrayList<Any>()
+        xs.add(null)
+        ys.add(null)
+        xs.clear()
+        ys.clear()
+        zs.add(null)
+    }
+}