[sfUnobstrusiveWidgetPlugin] change getJsConfigCallback function to allow array in js_config option
[sfUnobstrusiveWidgetPlugin] change getJsConfigCallback function to allow array in js_config option


git-svn-id: e066ce25d2acef5a8ddbfbadd130dd6243c8df74@17290 ee427ae8-e902-0410-961c-c3ed070cd9f9

Symfony-Plugins/sfUnobstrusiveWidgetPlugin,Symfony-Plugins/sfUnobstrusiveWidgetPlugin