FIX: OnReconnectionClientsGetTwinsPulled() increased timeout (Azure#5595

)

The normal execution time (on a PC) was very close 30sec which was the defined timeout value - so in case of a hiccup the test timed out. Doubled the timeout value which no has more buffer for slower environments.

edge-hub/core/test/Microsoft.Azure.Devices.Edge.Hub.MqttBrokerAdapter.Test/ConnectionEventTest.cs

@@ -32,7 +32,7 @@ public class ConnectionEventTest
     {
         const int SafeProcessingDelayMs = 2000;
 
-        static readonly TimeSpan TotalProcessingTimeout = TimeSpan.FromSeconds(30);
+        static readonly TimeSpan TotalProcessingTimeout = TimeSpan.FromSeconds(60);
 
         static readonly string iotHubName = "testHub";
         static readonly string edgeModuleName = "$edgeHub";