Java to Kotlin conversion: fixed a few bugs related to modifiers

#KT-4424 Fixed

j2k/tests/testData/ast/settings/openByDefault.java

@@ -0,0 +1,29 @@
+//file
+// !openByDefault: true
+
+class A {
+    void foo1() { }
+    private void foo2(){}
+    final void foo3(){}
+}
+
+final class B {
+    void foo(){}
+}
+
+abstract class C {
+    abstract void foo();
+}
+
+interface I{
+    void foo();
+}
+
+class D implements I {
+    @Override
+    public void foo() { }
+}
+
+enum E {
+    int foo() { return 0; }
+}