MAGETWO-39663: Product save through API service is not visible on frontend(direct url, category page)

- fixed integration test

Author: arkadiych

dev/tests/integration/testsuite/Magento/Catalog/Model/Layer/Filter/Price/_files/products_base.php

@@ -89,6 +89,11 @@
             'simple-' . $productId
         )->setPrice(
             $price
+        )->setStockData(
+            [
+                'qty' => 100,
+                'is_in_stock' => 1,
+            ]
         )->setWeight(
             18
         )->setCategoryIds(