MAGETWO-36951: Decrease CRAP of Magento\Review\Model\Resource\Review::aggregate

- CR fix

Author: Victor Rad

app/code/Magento/Review/Model/Resource/Review.php

@@ -338,7 +338,7 @@ public function aggregate($object)
      * Aggregate review summary
      *
      * @param \Magento\Framework\Model\AbstractModel $object
-     * @param \Magento\Framework\Data\Collection\Db $ratingSummaryObject
+     * @param \Magento\Review\Model\Rating $ratingSummaryObject
      * @return void
      */
     protected function aggregateReviewSummary($object, $ratingSummaryObject)

dev/tests/integration/testsuite/Magento/Review/Model/Resource/Review/ReviewTest.php

@@ -21,9 +21,9 @@ class ReviewTest extends \PHPUnit_Framework_TestCase
     protected $reviewResource;
 
     /**
-     * @var \Magento\Review\Model\Review
+     * @var \Magento\Review\Model\Resource\Review\Collection
      */
-    protected $review;
+    protected $reviewCollection;
 
     /**
      * @var \Magento\Framework\App\Resource
@@ -43,7 +43,7 @@ protected function setUp()
         $this->objectManager = \Magento\TestFramework\Helper\Bootstrap::getObjectManager();
         $this->resource = $this->objectManager->get('Magento\Framework\App\Resource');
         $this->adapter = $this->resource->getConnection('core_read');
-        $this->review = $this->objectManager->create('Magento\Review\Model\Review');
+        $this->reviewCollection = $this->objectManager->create('Magento\Review\Model\Resource\Review\Collection');
         $this->reviewResource =  $this->objectManager->create('Magento\Review\Model\Resource\Review');
     }
 
@@ -52,7 +52,7 @@ protected function setUp()
      */
     public function testAggregate()
     {
-        $rating = $this->review->getCollection()->getFirstItem();
+        $rating = $this->reviewCollection->getFirstItem();
         $this->reviewResource->aggregate($rating);
 
         $select = $this->adapter->select()->from($this->resource->getTableName('review_entity_summary'));