Fixes DsClient log message printing

We should be suppressing these message, but were not. Realistically,
this needs a rewrite of logger. That will come this summer.

Author: ThadHouse

src/FRC.NetworkTables/DSClient.cs

@@ -78,6 +78,7 @@ private void TaskMain()
         {
             uint oldIp = 0;
             Logger logger = new Logger(); // To silence log messages
+            logger.SetLogger(null);
 
             while (m_active)
             {