criterion discussion: memory test tool

[Kamil Paral]

> > > The thread indicates the criterion was created ad-hoc, "the tool
> > > is
> > > there, let's codify it". Since we try to be more conservative
> > > about
> > > what is and what is not a blocker lately, I think this is a good
> > > candidate for removal.
> > 
> > Yeah, I think you have a point, as I said.
> 
> If there are no more opinions on that matter, I intend to remove the
> criterion. Please don't forget this action doesn't remove the tool
> itself from the installation media, not at all. It just says that
> the tool doesn't belong to the category of "bare essentials" we want
> to block our release on.

Done, and the related test case marked as optional.