Drop enum class object hack

Place valueOf() and values() into the static scope of the corresponding enum
class

 #KT-5580 Fixed
 #KT-2410 Fixed

idea/testData/checker/ClassObjectInEnum.kt

@@ -0,0 +1,11 @@
+enum class E {
+    ENTRY
+
+    class object {
+        fun foo(): E = ENTRY
+    }
+}
+
+fun foo() = E.ENTRY
+fun bar() = E.values()
+fun baz() = E.valueOf("ENTRY")

idea/tests/org/jetbrains/jet/checkers/JetPsiCheckerTestGenerated.java

@@ -95,6 +95,11 @@ public class JetPsiCheckerTestGenerated extends AbstractJetPsiCheckerTest {
             doTest(fileName);
         }
         
+        @TestMetadata("ClassObjectInEnum.kt")
+        public void testClassObjectInEnum() throws Exception {
+            doTest("idea/testData/checker/ClassObjectInEnum.kt");
+        }
+        
         @TestMetadata("ClassObjects.kt")
         public void testClassObjects() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/checker/ClassObjects.kt");