making notifies :immediately

My mount resource on `my_recipe` fails with the following run_list, which is likely because `:restart, 'service[portmap]'` and `:restart, 'service[nfslock]'` are executed after `mount` in my_recipe. And, adding `:immediately` on the `notifies :restart`s of the `nfs::default` fixed the issue. 

```
{
  "run_list": [
    "role[nfs_base]",
    "recipe[my_recipe]"
  ]
}
```

Not sure if the issue is local to my environment. My chef version is 11.10.4.