Disable kernel unit tests.

pkg/kernel/test/type_hashcode_test_disabled.dart

 // Copyright (c) 2016, 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.
 import 'package:kernel/kernel.dart';
 import 'type_parser.dart';
 import 'type_unification_test.dart' show testCases;
 import 'package:test/test.dart';
 
 void checkHashCodeEquality(DartType type1, DartType type2) {
   if (type1 == type2 && type1.hashCode != type2.hashCode) {
@@ skipping 20 matching lines @@
     test('$testCase', () {
       var env = new LazyTypeEnvironment();
       var type1 = env.parse(testCase.type1);
       var type2 = env.parse(testCase.type2);
       checkHashCodeEquality(type1, type2);
       checkHashCodeRange(type1);
       checkHashCodeRange(type2);
     });
   }
 }