Add nsd-control (#454)

* Create nsd_control.py

Init nsd_control.py

* cleanup nsd-control + add test data

- Cleanup nsd-control parser
- Add test data

* add test script

add test script + fix test data

* Update test_nsd_control.py

fix a default test

* Update test_nsd_control.py

nit

jc/lib.py

@@ -92,6 +92,7 @@ parsers: List[str] = [
     'mpstat-s',
     'netstat',
     'nmcli',
+    'nsd-control',
     'ntpq',
     'openvpn',
     'os-prober',