Added unit tests for arguments to ignore in setLanguage() (base i18n API)
Added unit tests for arguments to ignore in setLanguage() (base i18n API)

These are unit tests for corner cases: non-string language codes and DOM node
either omitted or not an element.

eric-brechemier/lb_js_scalableApp,eric-brechemier/lb_js_scalableApp,eric-brechemier/lb_js_scalableApp