cobbler: Use real name where appropriate
cobbler: Use real name where appropriate

The real cobbler system name needs to be used in many places, not the
"public" (host-) name provided by get_name().

Signed-off-by: Fabian Deutsch <de69c509e52dfe544d526a81279fe21e1252748c@fedoraproject.org>

fabiand/igor,fabiand/igor,fabiand/igor