domainGenerator.py: disable the remote interface

The remote interface sometimes gets in the way of XML generation when the port
is already in use. A "retry" mechanism existed in the previous generator but
was unreliable.

In the new generator, we disable it altogether as we don't need it.

Change-Id: I0a1850058b688f5ea09b93959601d3c706d812b6
Signed-off-by: David Wagner <david.wagner@intel.com>