MAGETWO-66318: Remove usages of serialize/unserialize in CmsSampleData

- fix static test failurs

Author: Joan He

app/code/Magento/Cms/Setup/ContentConverter.php

@@ -22,10 +22,11 @@ class ContentConverter extends SerializedToJson
     private $parameterFactory;
 
     /**
-     * Constructor
+     * ContentConverter constructor
      *
      * @param Serialize $serialize
      * @param Json $json
+     * @param \Magento\Framework\Filter\Template\Tokenizer\ParameterFactory $parameterFactory
      */
     public function __construct(
         Serialize $serialize,

app/code/Magento/Cms/Setup/UpgradeData.php

@@ -130,6 +130,7 @@ private function createPage()
      * Upgrade data to version 2.0.1,
      *
      * @return void
+     * @SuppressWarnings(PHPMD.ExcessiveMethodLength)
      */
     private function upgradeVersionTwoZeroOne()
     {

dev/tests/integration/testsuite/Magento/Cms/Setup/ContentConverterTest.php

@@ -13,7 +13,8 @@ class ContentConverterTest extends \Magento\TestFramework\TestCase\AbstractContr
     protected function setUp()
     {
         $this->converter = \Magento\TestFramework\Helper\Bootstrap::getObjectManager()->create(
-            \Magento\Cms\Setup\ContentConverter::class);
+            \Magento\Cms\Setup\ContentConverter::class
+        );
     }
 
     /**

dev/tests/integration/testsuite/Magento/Widget/Setup/LayoutUpdateConverterTest.php

@@ -3,9 +3,7 @@
  * Copyright © 2013-2017 Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-namespace Magento\Cms\Setup;
-
-use Magento\Widget\Setup\LayoutUpdateConverter;
+namespace Magento\Widget\Setup;
 
 class LayoutUpdateConverterTest extends \Magento\TestFramework\TestCase\AbstractController
 {
@@ -15,7 +13,8 @@ class LayoutUpdateConverterTest extends \Magento\TestFramework\TestCase\Abstract
     protected function setUp()
     {
         $this->converter = \Magento\TestFramework\Helper\Bootstrap::getObjectManager()->create(
-            LayoutUpdateConverter::class);
+            LayoutUpdateConverter::class
+        );
     }
 
     /**