Fixed bug where server wasn't being unregistered from discovery server

- Added missing unregister() method call

Tags: #story[1281]

src/main/java/seng302/discoveryServer/DiscoveryServerClient.java

@@ -19,7 +19,7 @@ import java.util.Timer;
 import java.util.TimerTask;
 
 public class DiscoveryServerClient {
-    private final Integer UPDATE_INTERVAL_MS = 1000;
+    private final Integer UPDATE_INTERVAL_MS = 700;
 
     private static String roomCode = null;
     private Timer serverListingUpdateTimer;

src/main/java/seng302/discoveryServer/util/ServerListing.java

@@ -1,7 +1,7 @@
 package seng302.discoveryServer.util;
 
 public class ServerListing {
-    public final static int SERVER_TTL_DEFAULT = 3;
+    public final static int SERVER_TTL_DEFAULT = 5;
 
     private String serverName = "";
     private String mapName = "";

src/main/java/seng302/gameServer/ServerAdvertiser.java

@@ -146,6 +146,8 @@ public class ServerAdvertiser {
     public void unregister(){
         if (serviceInfo != null)
             jmdnsInstance.unregisterService(serviceInfo);
+
+        repositoryClient.unregister();
     }
 
     /**