HTML lang attributes get stripped out

[patrickmj]

Per the forums https://forum.omeka.org/t/foreign-language-metadata-markup/4411/2

Even with security settings for HTML turned off, lang attribute is stripped out when importing HTML content. Seems like somewhere the plugin is enforcing some kind of security settings.

[patrickmj]

Confirmed: commenting out https://github.com/omeka/plugin-CsvImport/blob/master/models/CsvImport/ColumnMap/Element.php#L44 lets lang attribute come in okay.