Extend a delay in TestConnection from 50 to 100 milliseconds.

The 50 ms delay causes frequent test failures on certain systems with
slow network stacks, these failures go away with the 100 ms variant.

src/test.cpp

@@ -1452,7 +1452,7 @@ struct TestConnection: public TestBase
 		// Server should not have added client yet
 		UASSERT(hand_server.count == 0);
 		
-		sleep_ms(50);
+		sleep_ms(100);
 
 		try
 		{