j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/inheritance/openModifier.java

@@ -0,0 +1,48 @@
+import java.lang.Override;
+import java.lang.Void;
+
+class A {
+    public void f1(){}
+    public void f2(){}
+    private void f3(){}
+}
+
+class B extends A {
+    @Override
+    public void f1() {
+        super.f1();
+    }
+}
+
+class C extends B {
+    @Override
+    public void f1() {
+        super.f1();
+    }
+}
+
+interface I {
+    void f();
+}
+
+class D implements I {
+    @Override
+    public void f() { }
+}
+
+abstract class E {
+    abstract void f1();
+    void f2(){}
+    void f3(){}
+}
+
+class F extends E {
+    @Override
+    void f1() {
+    }
+
+    @Override
+    void f2() {
+        super.f2();
+    }
+}