Added a check to make sure the output database exists if a create request is not made
Added a check to make sure the output database exists if a create request is not made

stiphyMT/plantcv,danforthcenter/plantcv,danforthcenter/plantcv,AntonSax/plantcv,jshoyer/plantcv,jshoyer/plantcv,stiphyMT/plantcv,danforthcenter/plantcv,stiphyMT/plantcv,AntonSax/plantcv