Adds a pdb flag under the unittest task

[nkallergis]

Closes #194.

[gsnider2195]

Perhaps?

Suggested change

	if buffer:
	if buffer and not pdb:

[nkallergis]

I toyed with this idea but I feel it's a bit counterintuitive and against the "explicit better than implicit" principle. Just a personal opinion though, I'm OK to implement it this way if you feel strong about it...

[gsnider2195]

Whenever I put a breakpoint in a test and forget to use --no-buffer it doesn't output anything and just freezes until I do a docker stop on the container. Does the same thing happen with --pdb?

[nkallergis]

Indeed, you have to add --no-buffer too to get to the interesting part. I take it you prefer to auto-add it as it makes more sense?

[gsnider2195]

If the behavior when you forget --no-buffer is that it silently fails then I would prefer to add it automatically