uniform disc dropper respawns

src/engine/gameManager/LootManager.java

@@ -102,6 +102,9 @@ public enum LootManager {
                     DispatchMessage.dispatchMsgToAll(chatMsg);
                 }
                 if (ib.isDiscRune() && mob.level < 60){
+                    if(Mob.disciplineDroppers.contains(mob) == false){
+                        Mob.disciplineDroppers.add(mob);
+                    }
                     mob.level = 60;
                     mob.healthMax = 7500;
                     mob.setHealth(7500);