vz: fix active domain listing

vz: fix active domain listing

Since commit 9c14a9ab we have broken active domain listing
because reworked prlsdkLoadDomain doesn't set dom->def->id
propely. It just looses it when a new def structure is set.
Now we make prlsdkConvertDomainState function return void
and move calling it after an old dom->def is replaces with
a new one within prlsdkLoadDomain function.

Signed-off-by: Maxim Nestratov <mnestratov@virtuozzo.com>