Shuffle new leader selection

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

FightSystem_Core/src/de/steamwar/fightsystem/fight/FightTeam.java

@@ -219,7 +219,9 @@ public class FightTeam {
         playerSet.forEach(p -> addMember(p, true));
 
         if(ArenaMode.VariableTeams.contains(Config.mode) && isLeaderless()){
-            for(Player player : Bukkit.getOnlinePlayers()){
+            List<Player> onlinePlayers = new ArrayList<>(Bukkit.getOnlinePlayers());
+            Collections.shuffle(onlinePlayers);
+            for(Player player : onlinePlayers) {
                 if(Fight.getPlayerTeam(player) == null && canbeLeader(player)){
                     addMember(player);
                     break;