Staggered kick to prevent a lobby crash

Signed-off-by: Lixfel <agga-games@gmx.de>

FightSystem_API/src/de/steamwar/fightsystem/IFightSystem.java

@@ -46,7 +46,17 @@ public class IFightSystem {
     public static void shutdown(String reason){
         if(reason != null)
             Bukkit.broadcastMessage(reason);
-        Bukkit.getOnlinePlayers().forEach(player -> player.kickPlayer(null));
+        //Staggered kick to prevent lobby overloading
+        kickNext();
+    }
+
+    private static void kickNext(){
+        if(Bukkit.getOnlinePlayers().isEmpty()){
             Bukkit.shutdown();
+            return;
+        }
+
+        Bukkit.getOnlinePlayers().iterator().next().kickPlayer(null);
+        Bukkit.getScheduler().runTaskLater(plugin, IFightSystem::kickNext, 10);
     }
 }