Fix NetBox 3 changed API keys

NetBoxAPI v3 deprecated attribute display_name

netglass/netglass.py

@@ -74,7 +74,7 @@ def net_nodes():
             'firstseen': lastseen.isoformat(),
             'lastseen': lastseen.isoformat(),
             'nodeinfo': {
-                'hostname': node.display_name,
+                'hostname': node.name if node.name else f"Unnamed Device ({node.id})",
                 'node_id': str(node.id),
                 'network': { 'mac': node.name, 'addresses': addresses },
                 'mesh_interfaces': [node.name],