#479 part 2, use debug logging instead of info (#480)

#479 part 2, use debug instead of info logging.

2 whitespace cleanups also included, as well as rewording props -> properties like in the rest of portproperties.pm

lib/App/Netdisco/Worker/Plugin/Discover/VLANs.pm

@@ -49,7 +49,7 @@ register_worker({ phase => 'main', driver => 'snmp' }, sub {
       my $port = $interfaces->{$entry} or next;
 
       if (!defined $device_ports->{$port}) {
-          info sprintf ' [%s] vlans - local port %s not in database!',
+          debug sprintf ' [%s] vlans - local port %s already skipped, ignoring',
             $device->ip, $port;
           next;
       }