do the stock check on default level because the stock on website level isn't updated and should be ignored

Product's are linked to categories without notice of any website. The visual merchandiser shows to lowest price of in stock and active simples that are associated with the configurable. The stock check ignores the website scope so if a simple is in stock on the website level but out of stock on default level it should been ignored to determine the lowest price. This commit fixes that issue.

Author: joost-florijn-kega

app/code/Magento/CatalogInventory/Model/ResourceModel/Product/StockStatusBaseSelectProcessor.php

@@ -56,7 +56,9 @@ public function process(Select $select)
                 ['stock' => $stockStatusTable],
                 sprintf('stock.product_id = %s.entity_id', BaseSelectProcessorInterface::PRODUCT_TABLE_ALIAS),
                 []
-            )->where('stock.stock_status = ?', Stock::STOCK_IN_STOCK);
+            )
+                ->where('stock.stock_status = ?', Stock::STOCK_IN_STOCK)
+                ->where('stock.website_id = ?', 0);
         }
 
         return $select;