Add arena map world name identifier for TowerRun and TNTLeague

TNTLeague/src/de/steamwar/tntleague/TNTLeague.kt

@@ -19,6 +19,8 @@
 
 package de.steamwar.tntleague
 
+import de.steamwar.core.Core
+import de.steamwar.core.WorldIdentifier
 import de.steamwar.message.Message
 import de.steamwar.tntleague.command.*
 import de.steamwar.tntleague.events.GlobalListener
@@ -43,6 +45,11 @@ class TNTLeague : JavaPlugin() {
 
         logger.info("TNTLeague enabled")
 
+        val arenaMap = System.getProperty("arenaMap")
+        if (arenaMap != null) {
+            WorldIdentifier.set("fight/" + Core.getVersion() + "/" + arenaMap)
+        }
+
         ReadyCommand.register()
         InviteCommand.register()
         AcceptCommand.register()