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

j2k/tests/testData/ast/staticMembers/PrivateStaticMethods4.java

@@ -0,0 +1,15 @@
+//file
+class A {
+    public class Inner {
+        void foo() {
+            privateStatic1();
+        }
+    }
+
+    void bar() {
+        privateStatic2();
+    }
+
+    private static void privateStatic1(){}
+    private static void privateStatic2(){}
+}