Split up server_domain_int_test.dart; regularize integration test directories.

pkg/analysis_server/test/integration/server/shutdown_test.dart

+// Copyright (c) 2014, 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.
+
+library test.integration.server.shutdown;
+
+import 'dart:async';
+
+import 'package:analysis_testing/reflective_tests.dart';
+import 'package:unittest/unittest.dart';
+
+import '../integration_tests.dart';
+
+@ReflectiveTestCase()
+class Test extends AbstractAnalysisServerIntegrationTest {
+  test_shutdown() {
+    return sendServerShutdown().then((_) {
+      return new Future.delayed(new Duration(seconds: 1)).then((_) {
+        sendServerGetVersion().then((_) {
+          fail('Server still alive after server.shutdown');
+        });
+        // Give the server time to respond before terminating the test.
+        return new Future.delayed(new Duration(seconds: 1));
+      });
+    });
+  }
+}
+
+main() {
+  runReflectiveTests(Test);
+}