j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/constructors/staticFieldRefInFactoryFun.kt

@@ -0,0 +1,14 @@
+// ERROR: Cannot access 'staticField1': it is 'private' in '<class-object-for-C>'
+// ERROR: Cannot access 'staticField2': it is 'private' in '<class-object-for-C>'
+fun C(p: Int): C {
+    val __ = C()
+    System.out.println(C.staticField1 + C.staticField2)
+    return __
+}
+
+class C {
+    class object {
+        private val staticField1 = 0
+        private val staticField2 = 0
+    }
+}