Code review comment for lp:~adeuring/launchpad/hwdb-class-udev-device-2

This branch adds a few USB-related properties to class UdevDevice, which will be used in the script hwdbsubmisison.py to process HWDB submission coming from the client in Karmic.

The branch also adds some sanity checks for USB-related data, to ensure that required properties exist and that their values have the correct format.

tests:

./bin/test --test=test_hwdb_submission_parser/bin/test --test=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_parser.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

lib/canonical/launchpad/scripts/tests/test_hwdb_submission_parser.py
    10: redefinition of unused 'etree' from line 8

== Pylint notices ==

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

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

These complaints are not not related to my cheanges; the come from a branch which prepares LP for Python 2.5