[freeboxos] Fix macAddress property when discovering a server (openhab#17082)

Fix openhab#17071

Signed-off-by: Laurent Garnier <[email protected]>

Author: lolodomo

bundles/org.openhab.binding.freeboxos/src/main/java/org/openhab/binding/freeboxos/internal/discovery/FreeboxOsDiscoveryService.java

@@ -236,7 +236,7 @@ private void discoverServer(SystemManager systemManager, ThingUID bridgeUID) thr
 
             DiscoveryResult discoveryResult = DiscoveryResultBuilder.create(thingUID).withBridge(bridgeUID)
                     .withRepresentationProperty(Thing.PROPERTY_MAC_ADDRESS).withLabel(config.modelInfo().prettyName())
-                    .withProperty(Thing.PROPERTY_MAC_ADDRESS, config.mac()).build();
+                    .withProperty(Thing.PROPERTY_MAC_ADDRESS, config.mac().toColonDelimitedString()).build();
             thingDiscovered(discoveryResult);
         } catch (PermissionException e) {
             logger.warn("Missing permission to discover Server {}", e.getPermission());