MAGETWO-64625: Implement API for file downloading by MA

fix tests

Author: valdislav

dev/tests/api-functional/testsuite/Magento/Analytics/Api/LinkProviderTest.php

@@ -58,7 +58,7 @@ public function testGetAll()
         ];
         $response = $this->_webApiCall($serviceInfo);
         $this->assertEquals(2, count($response));
-        $this->assertEquals($fileInfo->getInitializationVector(), base64_encode($response['initialization_vector']));
+        $this->assertEquals(base64_encode($fileInfo->getInitializationVector()), $response['initialization_vector']);
         $this->assertEquals(
             $storeManager->getStore()->getBaseUrl(
                 UrlInterface::URL_TYPE_MEDIA

dev/tests/integration/testsuite/Magento/Analytics/_files/create_link.php

@@ -14,9 +14,9 @@
 /**
  * @var $fileInfo \Magento\Analytics\Model\FileInfo
  */
-$fileInfo = $objectManager->create(\Magento\Analytics\Model\FileInfo::class);
-
-$fileInfo->setPath('analytics/jsldjsfdkldf/data.tgz');
-$fileInfo->setInitializationVector("binaryDataisdodssds8iui");
+$fileInfo = $objectManager->create(
+    \Magento\Analytics\Model\FileInfo::class,
+    ['path' => 'analytics/jsldjsfdkldf/data.tgz', 'initializationVector' => 'binaryDataisdodssds8iui']
+);
 
 $fileInfoManager->save($fileInfo);