debug test.py not limiting test output in debug mode - facilitates faster build runtimes

[maxkazmsft]

Too many images are being added to the test1 split dump in test.py – we should not be scoring the entire batch with debug flag with the code in test.py

    if debug:
        logger.info("Running in Debug/Test mode")
        test_loader = take(2, test_loader)

but somehow we are doing this anyway.

Make sure that we understand this behaviour, as with even 2 slices and slicing in the inline direction, we should not have so many patches which are dumped for scoring. This could be related to #330 as if we're scoring too many empty and largely padded patches, this functionality is not needed.

Restructuing: potentially remove "if debug" and subset the data for tests across the board.