Fixed Critical Errors in MFTF tests

Author: anzin

app/code/Magento/Bundle/Model/Product/SelectionProductsDisabledRequired.php

@@ -10,6 +10,7 @@
 use Magento\Framework\EntityManager\MetadataPool;
 use Magento\Catalog\Model\Product\Attribute\Source\Status;
 use Magento\Bundle\Model\ResourceModel\Selection as BundleSelection;
+use Magento\Store\Model\Store;
 use Magento\Store\Model\StoreManagerInterface;
 use Magento\Catalog\Model\ResourceModel\Product\CollectionFactory as ProductCollectionFactory;
 use Magento\Catalog\Model\Product;
@@ -128,7 +129,8 @@ public function getChildProductIds(int $bundleId, ?int $websiteId = null): array
     private function getProducts(array $selectionProductIds, int $websiteId): array
     {
         $productIds = [];
-        $defaultStoreId = $this->storeManager->getWebsite($websiteId)->getDefaultStore()->getId();
+        $defaultStore = $this->storeManager->getWebsite($websiteId)->getDefaultStore();
+        $defaultStoreId = $defaultStore ? $defaultStore->getId() : Store::DEFAULT_STORE_ID;
         foreach ($selectionProductIds as $optionProductIds) {
             $productIds = array_merge($productIds, $optionProductIds);
         }

lib/internal/Magento/Framework/Filesystem/Driver/Http.php

@@ -246,11 +246,11 @@ protected function getScheme($scheme = null)
      * @param string $hostname
      * @param int $port
      * @throws \Magento\Framework\Exception\FileSystemException
-     * @return array
+     * @return resource|bool
      */
     protected function open($hostname, $port)
     {
-        $result = @fsockopen($hostname, $port, $errorNumber = null, $errorMessage = null);
+        $result = @fsockopen($hostname, $port, $errorNumber, $errorMessage);
         if ($result === false) {
             throw new FileSystemException(
                 new \Magento\Framework\Phrase(