Fix impl of virDomainCreateWithFlags remote client helper

Fix impl of virDomainCreateWithFlags remote client helper

In the following commit:

  commit 03d813bbcd7b4a18360105500672b84d985dd889
  Author: Marek Marczykowski <marmarek@invisiblethingslab.com>
  Date:   Thu May 23 02:01:30 2013 +0200

    remote: fix dom->id after virDomainCreateWithFlags

The virDomainCreateWithFlags remote client helper was made to
invoke REMOTE_PROC_DOMAIN_LOOKUP_BY_UUID to refresh the 'id'
of the domain, following the pattern used in the previous
virDomainCreate method impl.

The remote protocol for virDomainCreateWithFlags though did
actually fix the design flaw in virDomainCreate, by directly
returning the new domain info. For some reason, this data was
never used. So we can just use that data now instead.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>