deploy: Some minor changes in qa-sample.json

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
deploy: Fix fqdn needed for Ganeti QA

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
deploy: Change os-search-path in Ganeti configure

QA tests invalid OSes by adding an OS without create script. It
adds it under the first path found in os-search-path list. In
our case the first directory is a common dir for all nodes (NFS)
so the partially invalid OS check does not fail as expected.

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
deploy: Fix interfaces and ferm

Do not use a dummy interface. Instead, if in --autoconf
use bridge_ports none in interfaces.synnefo and do
MAC MASQ on the public interface (which gets autodetected).

Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>