tools: Add missing keyword `node-msd` in frr-reload

tools: Add missing keyword `node-msd` in frr-reload

Fix the error below:

```
[58564|mgmtd] sending configuration
[58565|zebra] sending configuration,
line 14: % Unknown command[52]:  max-segs-left 3
line 18: % Unknown command[52]:  max-end-pop 3
line 22: % Unknown command[52]:  max-h-encaps 2
line 26: % Unknown command[52]:  max-end-d 5
[58573|isisd] sending configuration
[58565|zebra] Configuration file[/etc/frr/frr.conf] processing failure: 2
```

Signed-off-by: Carmine Scarpitta <cscarpit@cisco.com>