Fix duplicate results when doing prediction

[Microsheep]

Fixes: #280

This fixes the problem with duplicate results when doing prediction due to loadBaseDocs been called twice. Once in initFromSavedModel and once in loadBaseDocs. This will generate duplicate entries in baseDocVectors_ which will be a problem in predictOne

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[everdark]

I think the fix is not working due to initFromSavedModel still being called twice.
Instead of removing the loadBaseDocs call from query_predict, we should remove the call in initFromSavedModel.