fix ltv usage for renderer tests

    # if in REF or CUT creation mode use the comparetestv

    if test_info.config.option.create_ref or test_info.config.option.create_cut:

        FORMAT_TO_FILE = FORMAT_TO_FILE_COMPARETEST

    elif test_info.config.option.use_ltv:

        format_to_file = FORMAT_TO_FILE_COMPARETEST

    else:

        format_to_file = FORMAT_TO_FILE_SMOKETEST

    if test_info.config.option.use_ltv:

        if test_info.config.option.ltv_dir:

            FORMAT_TO_FILE = dict()

            format_to_file = dict()

            for k, v in FORMAT_TO_FILE_LTV.items():

                FORMAT_TO_FILE[k] = str(v).replace(

                format_to_file[k] = str(v).replace(

                    str(LTV_DIR), str(test_info.config.option.ltv_dir)

                )

        else:

            FORMAT_TO_FILE = FORMAT_TO_FILE_LTV

    else:

        FORMAT_TO_FILE = FORMAT_TO_FILE_SMOKETEST

            format_to_file = FORMAT_TO_FILE_LTV

    if in_file is None:

        if metadata_input is not None:

            in_file = metadata_input

            in_name = metadata_input.stem

        elif not isinstance(in_fmt, str):

            in_file = FORMAT_TO_FILE[in_fmt.stem]

            in_file = format_to_file[in_fmt.stem]

            in_name = in_fmt.stem

        else:

            in_file = FORMAT_TO_FILE[in_fmt]

            in_file = format_to_file[in_fmt]

            in_name = in_fmt

    if out_file is None: