For netOrk MVP 5. This follows #1 (`manage_service = None`): QTS reads and applies no updates, so netOrk now keeps QNAP out of patching.
```
$ PYTHONPATH=.:../napalm-linux:../napalm-device-types pytest -q tests
38 passed, 1 xfailed
```
QTS has no apt, dnf or opkg, so the update readers inherited from
LinuxDriver find no package manager, and QPKG updates are not implemented.
get_available_updates, refresh_available_updates and apply_updates are None,
the same opt-out as manage_service: netOrk's patch groups and compliance
report include a driver only when these are callable.
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For netOrk MVP 5. This follows #1 (
manage_service = None): QTS reads and applies no updates, so netOrk now keeps QNAP out of patching.