This reports device attributes like the following:

```
$ nomad node status -self -verbose
ID          = f7adb958-29e1-2a5a-2303-9d61ffaab33a
Name        = mars.local
Class       = <none>
DC          = dc1
Drain       = false
Eligibility = eligible
Status      = ready
Uptime      = 12h40m13s

Drivers
Driver       Detected  Healthy  Message                               Time
docker       true      true     healthy                               2018-12-10T11:47:19-05:00
...

Attributes
cpu.arch                      = amd64
cpu.frequency                 = 2200
cpu.modelname                 = Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
cpu.numcores                  = 12
...

Device Group Attributes
Device Group = nomad/file/mock
block_device = sda1
filesystem   = ext4
size         = 63.2 GB

Meta
```