Change regression predict_with_nan test to check for returned nan
Change regression predict_with_nan test to check for returned nan

AZMAG/urbansim,AZMAG/urbansim,UDST/urbansim,apdjustino/urbansim,synthicity/urbansim,UDST/urbansim,apdjustino/urbansim,UDST/urbansim,AZMAG/urbansim,UDST/urbansim,synthicity/urbansim,synthicity/urbansim,apdjustino/urbansim,synthicity/urbansim,AZMAG/urbansim,apdjustino/urbansim