Accept FQDN for System's __init__ and get_unique() methods
Accept FQDN for System's __init__ and get_unique() methods

Reviewed-by: Wesley Hertlein <ca32100e9f664971b15d1470ddc7f009d907efd3@morganstanley.com>

quattor/aquilon,guillaume-philippon/aquilon,quattor/aquilon,guillaume-philippon/aquilon,guillaume-philippon/aquilon,stdweird/aquilon,quattor/aquilon,stdweird/aquilon,stdweird/aquilon