Store device model and serial via UTF8 conversion

Netdisco/lib/App/Netdisco/Core/Discover.pm

@@ -154,7 +154,7 @@ sub store_device {
   my @properties = qw/
     snmp_ver
     description uptime contact name location
-    layers ports mac serial model
+    layers ports mac
     ps1_type ps2_type ps1_status ps2_status
     fan slots
     vendor os os_ver
@@ -164,6 +164,9 @@ sub store_device {
       $device->$property( $snmp->$property );
   }
 
+  $device->model(  Encode::decode('UTF-8', $snmp->model)  );
+  $device->serial( Encode::decode('UTF-8', $snmp->serial) );
+
   $device->snmp_class( $snmp->device_type );
   $device->last_discover(\'now()');