test rename overhaul: step 7 - corelib tests

tests/corelib/date_time_test.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 Date.
 
 class DateTest {
   // Tests if the time moves eventually forward.
   static void testNow() {
     var t1 = new Date.now();
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     testDateStrings();
     testEquivalentYears();
     testFarAwayDates();
     testWeekday();
   }
 }
 
 main() {
   DateTest.testMain();
 }