test rename overhaul: step 8 - language tests

tests/language/src/ConstructorDefaultTest.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-// Dart test program for default constructors.
-
-class A {
-  A() : a = 499;
-
-  var a;
-}
-
-class B extends A {
-  B() { Expect.equals(499, a); }
-}
-
-main() {
-  new B();
-}