Add price calculation improvement for product option value price

The price calculation relied on the getFinalPrice value, which if
called without the qty parameter will not consider tier prices.
This method was not updated when the price improvements have been
added around 4 years ago. See similar update that was added for
Magento\Catalog\Model\Product\Option.

Resolves: #5774

app/code/Magento/Catalog/Model/Product/Option/Value.php

@@ -11,6 +11,7 @@ namespace Magento\Catalog\Model\Product\Option;
 use Magento\Catalog\Model\Product;
 use Magento\Catalog\Model\Product\Option;
 use Magento\Framework\Model\AbstractModel;
+use Magento\Catalog\Pricing\Price\BasePrice;
 
 /**
  * Catalog product option select type model
@@ -223,7 +224,7 @@ class Value extends AbstractModel implements \Magento\Catalog\Api\Data\ProductCu
     public function getPrice($flag = false)
     {
         if ($flag && $this->getPriceType() == self::TYPE_PERCENT) {
-            $basePrice = $this->getOption()->getProduct()->getFinalPrice();
+            $basePrice = $this->getOption()->getProduct()->getPriceInfo()->getPrice(BasePrice::PRICE_CODE)->getValue();
             $price = $basePrice * ($this->_getData(self::KEY_PRICE) / 100);
             return $price;
         }