Converter from Java: do not produce class object for just private methods + fixed bug with unnecessary static member qualification

j2k/tests/testData/ast/staticMembers/PrivateStaticMethods2.java

@@ -0,0 +1,14 @@
+//file
+class A {
+    public void foo() {
+        privateStatic1();
+        privateStatic2();
+    }
+
+    public static void publicStatic(){
+        privateStatic1();
+    }
+
+    private static void privateStatic1(){}
+    private static void privateStatic2(){}
+}