Backport of PR 14352 for Magento 2.1: Fixed use config option for 'Enable Qty Increments' filed in product import

Author: simpleadm

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

@@ -2549,7 +2549,10 @@ private function _setStockUseConfigFieldsValues($rowData)
     {
         $useConfigFields = array();
         foreach ($rowData as $key => $value) {
-            $useConfigName = self::INVENTORY_USE_CONFIG_PREFIX . $key;
+            $useConfigName = $key === 'enable_qty_increments'
+                ? 'use_config_enable_qty_inc'
+                : self::INVENTORY_USE_CONFIG_PREFIX . $key;
+
             if (isset($this->defaultStockData[$key])
                 && isset($this->defaultStockData[$useConfigName])
                 && !empty($value)