Use the correct config value for cost-to-open

This commit changes payToOpen to use the correct value from the config as well as the default value listed in the config instead of
the default value for payToCreate.

src/main/java/com/drtshock/playervaults/vaultmanagement/EconomyOperations.java

@@ -49,7 +49,7 @@ public class EconomyOperations {
         if (UUIDVaultManager.getInstance().vaultExists(player.getUniqueId(), number)) {
             return payToCreate(player);
         } else {
-            double cost = BUKKIT_CONFIG.getDouble("economy.cost-to-create", 100);
+            double cost = BUKKIT_CONFIG.getDouble("economy.cost-to-open", 10);
             EconomyResponse resp = PlayerVaults.getInstance().getEconomy().withdrawPlayer(player.getName(), cost);
             if (resp.transactionSuccess()) {
                 player.sendMessage(Lang.TITLE.toString() + Lang.COST_TO_OPEN.toString().replaceAll("%price", "" + cost));