port change from AutobahnTester in SignalR (#148)

We increased the retry count (by just removing ours and using the default) because the app seems to be slow to start on macOS

Author: analogrelay

test/Microsoft.AspNetCore.WebSockets.ConformanceTest/Autobahn/AutobahnTester.cs

@@ -131,7 +131,7 @@ public async Task DeployTestAndAddToSpec(ServerType server, bool ssl, string env
             {
                 cancellationToken.ThrowIfCancellationRequested();
                 return client.GetAsync(result.ApplicationBaseUri);
-            }, logger, CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, result.HostShutdownToken).Token, retryCount: 5);
+            }, logger, CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, result.HostShutdownToken).Token);
             resp.EnsureSuccessStatusCode();
 
             cancellationToken.ThrowIfCancellationRequested();