MAGETWO-63159: Fix Sales Rule Data Model convertor to support extension attributes

Author: slavvka

app/code/Magento/SalesRule/Test/Unit/Model/Converter/ToDataModelTest.php

@@ -4,6 +4,7 @@
  * See COPYING.txt for license details.
  */
 namespace Magento\SalesRule\Test\Unit\Model\Converter;
+
 use Magento\SalesRule\Api\Data\RuleExtensionFactory;
 use Magento\SalesRule\Api\Data\RuleExtensionInterface;
 
@@ -176,7 +177,6 @@ public function testToDataModel()
             ->getMock();
         $arrayAttributes['extension_attributes'] = $attributesMock;
 
-
         $this->extensionFactoryMock->expects($this->any())
             ->method('create')
             ->with(['data' => $array['extension_attributes']])