classes declaration:

fix: class of the same unqualified name in package inside module (see MultiFileTest.testClassOfTheSameNameInAnotherPackage)

We don't ever try to use meaningful var name for temp class declaration — we remember about incremental compilation  inline final class declaration don't generate scope function if we don't need it

failed and fixed test: fast fix Kt817 (we must investigate, actually, it seems dart ast bug — we must have ability to declare name in our scope without check the same name in the parent scope)

perfomance: delete ClassSortingUtils, we don't need it

js/js.tests/test/org/jetbrains/k2js/test/semantics/MiscTest.java

@@ -20,6 +20,8 @@ import org.jetbrains.k2js.config.EcmaVersion;
 import org.jetbrains.k2js.translate.context.Namer;
 import org.mozilla.javascript.JavaScriptException;
 
+import java.util.EnumSet;
+
 /**
  * @author Pavel Talanov
  *         <p/>

js/js.tests/test/org/jetbrains/k2js/test/semantics/MultiFileTest.java

@@ -34,4 +34,8 @@ public final class MultiFileTest extends MultipleFilesTranslationTest {
     public void testClassesInheritedFromOtherFile() throws Exception {
         checkFooBoxIsTrue("classesInheritedFromOtherFile");
     }
+
+    public void testClassOfTheSameNameInAnotherPackage() throws Exception {
+        checkFooBoxIsTrue("classOfTheSameNameInAnotherPackage");
+    }
 }