yanglint CHANGE print error when invalid parser option is set
yanglint CHANGE print error when invalid parser option is set

in `data` command, invalid -x argument was ignored and the default
parser mode was used. Insted, it should announce error to user.

PavolVican/libyang,PavolVican/libyang,lukasmacko/libyang,PavolVican/libyang,lukasmacko/libyang,PavolVican/libyang,PavolVican/libyang