Bug: Database name not quoted

Hello,

In bug #718 wrote about does not quoted table name and field name, fix in this pull request.
Example with same code: [AbstractDb](https://github.com/magento/magento2/blob/c8b7223139366e8030b0b8ae43406495e46ec95e/lib/internal/Magento/Framework/Model/Resource/Db/AbstractDb.php#L380)


Thanks, Anton