Feature/extra request id test (#329)

* messing around with benchmark.net.seems Ocelot adds about 2ms to a request..lets make this less? :)

* #326 store json indented so it looks nice :P

* #327 show another test how request id works

test/Ocelot.AcceptanceTests/RequestIdTests.cs

@@ -132,6 +132,43 @@ namespace Ocelot.AcceptanceTests
                 .BDDfy();
         }
 
+        [Fact]
+        public void should_use_global_request_id_create_and_forward()
+        {
+            var configuration = new FileConfiguration
+            {
+                ReRoutes = new List<FileReRoute>
+                    {
+                        new FileReRoute
+                        {
+                            DownstreamPathTemplate = "/",
+                            DownstreamHostAndPorts = new List<FileHostAndPort>
+                            {
+                                new FileHostAndPort
+                                {
+                                    Host = "localhost",
+                                    Port = 51873,
+                                }
+                            },
+                            DownstreamScheme = "http",
+                            UpstreamPathTemplate = "/",
+                            UpstreamHttpMethod = new List<string> { "Get" },
+                        }
+                    },
+                GlobalConfiguration = new FileGlobalConfiguration
+                {
+                    RequestIdKey = _steps.RequestIdKey
+                }
+            };
+
+            this.Given(x => x.GivenThereIsAServiceRunningOn("http://localhost:51873"))
+                .And(x => _steps.GivenThereIsAConfiguration(configuration))
+                .And(x => _steps.GivenOcelotIsRunning())
+                .When(x => _steps.WhenIGetUrlOnTheApiGateway("/"))
+                .Then(x => _steps.ThenTheRequestIdIsReturned())
+                .BDDfy();
+        }
+
         private void GivenThereIsAServiceRunningOn(string url)
         {
             _builder = new WebHostBuilder()