Update unit tests

Author: chronoxor

tests/UdpMulticastTests.cs

@@ -1,5 +1,4 @@
-/*
-using System;
+using System;
 using System.Collections.Generic;
 using System.Net;
 using System.Net.Sockets;
@@ -273,4 +272,3 @@ public void UdpMulticastServerRandomTest()
         }
     }
 }
-*/

tests/UdpTests.cs

@@ -1,5 +1,4 @@
-/*
-using System;
+using System;
 using System.Collections.Generic;
 using System.Net;
 using System.Net.Sockets;
@@ -200,4 +199,3 @@ public void UdpServerRandomTest()
         }
     }
 }
-*/