fix bug in config saving
fix bug in config saving

SANDAG/urbansim,synthicity/urbansim,AZMAG/urbansim,apdjustino/urbansim,SANDAG/urbansim,bricegnichols/urbansim,VladimirTyrin/urbansim,synthicity/urbansim,AZMAG/urbansim,apdjustino/urbansim,VladimirTyrin/urbansim,bricegnichols/urbansim,VladimirTyrin/urbansim,synthicity/urbansim,apdjustino/urbansim,waddell/urbansim,ual/urbansim,bricegnichols/urbansim,ual/urbansim,waddell/urbansim,waddell/urbansim,apdjustino/urbansim,UDST/urbansim,VladimirTyrin/urbansim,ual/urbansim,UDST/urbansim,waddell/urbansim,synthicity/urbansim,ual/urbansim,bricegnichols/urbansim,SANDAG/urbansim,AZMAG/urbansim,UDST/urbansim,AZMAG/urbansim,SANDAG/urbansim,UDST/urbansim