MAGETWO-31001: [GoInc] Improve Change Risk Analysis and Predictions Metric

- MAGETWO-31970: Magento\Catalog\Block\Navigation::_renderCategoryMenuItemHtml
- revert invalid change in unit test

Author: Michail Slabko

dev/tests/unit/testsuite/Magento/Catalog/Block/NavigationTest.php

@@ -14,9 +14,16 @@ class NavigationTest extends \PHPUnit_Framework_TestCase
     protected function setUp()
     {
         $objectManager = new \Magento\TestFramework\Helper\ObjectManager($this);
+        $categoryFactory = $this->getMock(
+            'Magento\Catalog\Model\CategoryFactory',
+            ['create'],
+            [],
+            '',
+            false
+        );
         $this->block = $objectManager->getObject(
             'Magento\Catalog\Block\Navigation',
-            []
+            ['categoryFactory' => $categoryFactory]
         );
     }