MAGETWO-64959: Grouped product is missing in category

Author: ameysar

dev/tests/integration/testsuite/Magento/Framework/Search/_files/grouped_product.php

@@ -19,7 +19,7 @@
 $objectManager = Bootstrap::getObjectManager();
 
 /** @var \Magento\Catalog\Api\ProductAttributeRepositoryInterface $attributeRepository */
-$attributeRepository = $objectManager->get(ProductAttributeRepositoryInterface::class);
+$attributeRepository = $objectManager->create(ProductAttributeRepositoryInterface::class);
 $attribute = $attributeRepository->get('tax_class_id');
 $attribute->setIsFilterableInSearch(true);
 $attributeRepository->save($attribute);