Code review comment for lp:~adeuring/launchpad/hwdb-refactor-haldevice-3

This branch is the third and last part to refactor class
l.c.l.scripts.hwdbsubmissions.HALDevice. See
https://code.edge.launchpad.net/~adeuring/launchpad/hwdb-refactor-haldevice/+merge/12669
for the reason of the refactoring.

The branch adds new properties scsi_vendor, scsi_model and driver_name
to BaseDevice and HALDevice (including short tests), and it defines some
"dummy properties" in class BaseDevice that correspond to exsting
properties in class HALDevice.

Finally, it moves methods that can be used both for class HALDevice and
the not-yet-existing class UdevDevice into class BaseDevice.

test: ./bin/test -t test_hwdb_submission_processing

= Launchpad lint =

Checking for conflicts. and issues in doctests and templates.
Running jslint, xmllint, pyflakes, and pylint.
Using normal rules.

Linting changed files:
  lib/canonical/launchpad/scripts/hwdbsubmissions.py
  lib/canonical/launchpad/scripts/tests/test_hwdb_submission_processing.py

== Pyflakes notices ==

lib/canonical/launchpad/scripts/hwdbsubmissions.py
    22: redefinition of unused 'etree' from line 20

== Pylint notices ==

lib/canonical/launchpad/scripts/hwdbsubmissions.py
    20: [F0401] Unable to import 'xml.etree.cElementTree' (No module
named etree)

A complaint caused by an unrelated branch that prepares Launchpad for
Python 2.5