Signed-off-by: NAndrea Bolognani <abologna@redhat.com>

This doesn't seem very useful at the moment, but it will make
sense once we introduce another HPT-related setting.

The output XML is decoupled from the input XML in preparation
of future changes as well; while doing so, we can shave a few
lines off the latter.

This commit is best viewed with 'git show -w'.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>

We're going to use the same test case to exercise all optional
pSeries features, so a more generic name is needed.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>