MAGETWO-33654: Unable to save newsletter subscription information of customer in backend

Author: slopok

app/code/Magento/Customer/Controller/Adminhtml/Index/Save.php

@@ -74,7 +74,7 @@ protected function _extractData(
         \Magento\Customer\Model\Metadata\Form $metadataForm = null
     ) {
         if ($metadataForm === null) {
-            $metadataForm = $this->_objectManager->get('Magento\Customer\Model\Metadata\FormFactory')->create(
+            $metadataForm = $this->_formFactory->create(
                 $entityType,
                 $formCode,
                 [],

app/code/Magento/Customer/Test/Unit/Block/Adminhtml/Edit/Tab/NewsletterTest.php

@@ -13,26 +13,32 @@ class NewsletterTest extends \PHPUnit_Framework_TestCase
      * @var \Magento\Customer\Block\Adminhtml\Edit\Tab\Newsletter
      */
     protected $model;
+
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
      */
     protected $contextMock;
+
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
      */
     protected $registryMock;
+
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
      */
     protected $formFactoryMock;
+
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
      */
     protected $subscriberFactoryMock;
+
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
      */
     protected $accountManagementMock;
+
     /**
      * @var \PHPUnit_Framework_MockObject_MockObject
      */