MC-20401: [Integration Test] CategoryTree::getTree() returns all the child categories

Author: viktorpetryk

dev/tests/integration/testsuite/Magento/Sales/_files/quotes.php

@@ -5,6 +5,7 @@
  */
 declare(strict_types=1);
 
+use Magento\Framework\App\Config;
 use Magento\Store\Model\StoreRepository;
 use Magento\Quote\Model\QuoteFactory;
 use Magento\Quote\Model\QuoteRepository;
@@ -21,6 +22,9 @@
 $quoteRepository = $objectManager->get(QuoteRepository::class);
 /** @var  StoreRepository $storeRepository */
 $storeRepository = $objectManager->get(StoreRepository::class);
+/** @var Config $appConfig */
+$appConfig = $objectManager->get(Config::class);
+$appConfig->clean();
 
 $defaultStore = $storeRepository->getActiveStoreByCode('default');
 $secondStore = $storeRepository->getActiveStoreByCode('fixture_second_store');