MAGETWO-66655 Stop $this->validColumnNames array from growing and growing #8928

- fix static test

Author: vrann

lib/internal/Magento/Framework/Model/ResourceModel/Type/Db/Pdo/Mysql.php

@@ -5,6 +5,8 @@
  */
 namespace Magento\Framework\Model\ResourceModel\Type\Db\Pdo;
 
+// @codingStandardsIgnoreFile
+
 use Magento\Framework\App\ResourceConnection\ConnectionAdapterInterface;
 use Magento\Framework\DB;
 use Magento\Framework\App\ObjectManager;