GenericTypeaheadInitializer override the scores with a default min value

[ferdiknight]

The GenerictypeaheadInitializer create a default ElementScoreScanner for create a Generictypeahead,whatever if the param elementScoreFile seted or not.

And this action make the typeahead instance override the scores with a default MIN_FLOAT_VALUE whatever if the element has a defined score or not when it init.