Use correct authentication method set in configuration for autosuggest url

The autosuggest url without authentication seems not to work, you'll see that an login is required.

Maybe it is a configuration flag inside the FACTFinder application itself and that was changed in the past, but the FACTFinder support there told an authenticated url is required.

I used the FACTFinder_Http_DataProvider to get the right authenticated url, i hope that is the right way to do it.