JS lib: added hasNext to Kotlin.ListIterator and fixed next.

#KT-6506 Fixed

Additionally made abstract AbstractList::get and AbstractCollection::size.

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

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2010-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.k2js.test.semantics;
+
+public final class AbstractListTest extends JavaClassesTest {
+
+    public AbstractListTest() {
+        super("abstractList/");
+    }
+
+    public void testIterator() throws Exception {
+        checkFooBoxIsOk();
+    }
+}