MAGETWO-53583: "Use Default" checkbox is checked again after saving empty fields (description, name, etc)

- add isolation for test

Author: vgoncharenko

dev/tests/integration/testsuite/Magento/Eav/Model/ResourceModel/UpdateHandlerTest.php

@@ -11,9 +11,8 @@
 /**
  * @magentoAppArea adminhtml
  * @magentoAppIsolation enabled
- * @magentoDbIsolation enabled
  */
-class UpdateHandlerTest extends \PHPUnit_Framework_TestCase
+class UpdateHandlerTest extends \Magento\TestFramework\Indexer\TestCase
 {
     /**
      * @covers       \Magento\Eav\Model\ResourceModel\UpdateHandler::execute