adding missing var for device loginip in disco output (#3572)

centreon-plugins/apps/ipfabric/mode/discovery.pm

@@ -79,6 +79,7 @@ sub manage_selection {
         $disco_data->{$device->{id}} = {
             id => $device->{id},
             hostname => $device->{hostname},
+	    loginIp => $device->{loginIp},
             siteName => $device->{siteName},
             vendor => $device->{vendor},
             family => $device->{family},
@@ -155,4 +156,4 @@ IP Fabric devices discovery.
 
 =back
 
-=cut
+=cut