balloon: bz#868240 fix hck warnings on driver inf test

The LoadOrderGroup directive is redundant and was removed. The
PnpLockdown directive is required starting Windows Vista and was
added.
serial: bz#868240: fix hck warnings on driver inf test

The LoadOrderGroup directive is redundant and was removed. The
PnpLockdown directive is required starting Windows Vista and was
added.
balloon: bz#921891: improve ballooning's performance.

A new implementation of the balloon's inflate and deflate's
functions. The pages are now allocated in a batch rather
than one page at a time and the pages are not zeroed when
allocated.