MAGETWO-66064: Remove usages of unserialize in module Magento/Catalog

Author: slopukhov

dev/tests/integration/testsuite/Magento/Catalog/Model/Product/Type/AbstractTypeTest.php

@@ -255,8 +255,7 @@ public function testGetOrderOptions()
 
         $product->load(1);
         // fixture
-        $customOption = new \Magento\Framework\DataObject(['qty' => 2]);
-        $product->addCustomOption('info_buyRequest', json_encode($customOption->getData()));
+        $product->addCustomOption('info_buyRequest', json_encode(['qty' => 2]));
         foreach ($product->getOptions() as $option) {
             if ('field' == $option->getType()) {
                 $product->addCustomOption('option_ids', $option->getId());