Reduced the ConnectionTimeout to be equivalent to the DisconnectTimeout.

- This allows us to know when a client has been gone from a server for too long.  Prime example is mobile devices when they go into sleep mode.

#2484

src/Microsoft.AspNet.SignalR.Core/Configuration/DefaultConfigurationManager.cs

@@ -22,7 +22,9 @@ public class DefaultConfigurationManager : IConfigurationManager
 
         public DefaultConfigurationManager()
         {
-            ConnectionTimeout = TimeSpan.FromSeconds(110);
+            // Make the connection timeout equivalent to the disconnect timeout so on the client we know when the
+            // server "may" have forgotten about us for the Long Polling transport.
+            ConnectionTimeout = TimeSpan.FromSeconds(30);
             DisconnectTimeout = TimeSpan.FromSeconds(30);
             DefaultMessageBufferSize = 1000;
             TransportConnectTimeout = TimeSpan.FromSeconds(5);