Using constants for qty increments in product import

Author: simpleadm

app/code/Magento/CatalogImportExport/Model/Import/Product.php

@@ -8,6 +8,7 @@
 
 namespace Magento\CatalogImportExport\Model\Import;
 
+use Magento\CatalogInventory\Api\Data\StockItemInterface;
 use Magento\Framework\App\Filesystem\DirectoryList;
 use Magento\CatalogImportExport\Model\Import\Product\RowValidatorInterface as ValidatorInterface;
 use Magento\Framework\Model\ResourceModel\Db\TransactionManagerInterface;
@@ -2549,8 +2550,8 @@ private function _setStockUseConfigFieldsValues($rowData)
     {
         $useConfigFields = array();
         foreach ($rowData as $key => $value) {
-            $useConfigName = $key === 'enable_qty_increments'
-                ? 'use_config_enable_qty_inc'
+            $useConfigName = $key === StockItemInterface::ENABLE_QTY_INCREMENTS
+                ? StockItemInterface::USE_CONFIG_ENABLE_QTY_INC
                 : self::INVENTORY_USE_CONFIG_PREFIX . $key;
 
             if (isset($this->defaultStockData[$key])