j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/constructors/staticFieldRefInFactoryFun.java

@@ -0,0 +1,12 @@
+class C {
+    private static int staticField1 = 0;
+    private static int staticField2 = 0;
+
+    C() {
+    }
+
+    C(int p) {
+        this();
+        System.out.println(staticField1 + C.staticField2);
+    }
+}