changed gameManager test to use newer visualizer

src/test/java/pacmanTests/GameManagerTest.java

@@ -31,14 +31,14 @@ class GameManagerTest {
 		// arrange
 
 		GameManager gameManager = new GameManager();
-		gameManager.visualizer = new VisualizerPlainText(gameManager);
-		VisualizerPlainText vpt = (VisualizerPlainText) gameManager.visualizer;
+		gameManager.visualizer = new VisualizerPlainTextUltra(gameManager);
+		VisualizerPlainTextUltra vptu = (VisualizerPlainTextUltra) gameManager.visualizer;
 		
 		// act
 
-		String initialVptOutput = (String)vpt.GetOutput();
+		String initialVptOutput = (String)vptu.GetOutput();
 		gameManager.Update();
-		String updatedVptOutput = (String)vpt.GetOutput();
+		String updatedVptOutput = (String)vptu.GetOutput();
 		
 		
 		// assert