Rename Http test to be more specific.

tests/standalone/src/io/HttpServerEarlyCloseTest.dart

-#import("dart:io");
-#import("dart:isolate");
-
-class Server {
-  Server() {
-    HttpServer server = new HttpServer();
-    server.listen("127.0.0.1", 0);
-    port = server.port;
-    server.onRequest = (HttpRequest request, HttpResponse response) {
-      new Timer(100, (timer) => server.close());
-    };
-    server.onError = (Object exception) {
-      Expect.fail("Close should not give an error.");
-    };
-  }
-  int port;
-}
-
-class Client {
-  Client(int port) {
-    ReceivePort r = new ReceivePort();
-    HttpClient client = new HttpClient();
-    HttpClientConnection c = client.get("127.0.0.1", port, "/");
-    c.onRequest = (HttpClientRequest request) {
-      request.outputStream.close();
-    };
-    c.onResponse = (HttpClientResponse response) {
-      Expect.fail("Response should not be given, as not data was returned.");
-    };
-    c.onError = (Object exception) {
-      r.close();
-    };
-  }
-}
-
-main() {
-  Server server = new Server();
-  new Client(server.port);
-}