[Merge] ~ddstreet/ubuntu-dev-tools:tox into ubuntu-dev-tools:master

[Dan Streetman]

This patch series cleans up some of the test-related code, as well as removing some scripts that have been long deprecated and/or non-functional.

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https://code.launchpad.net/~ddstreet/ubuntu-dev-tools/+git/ubuntu-dev-tools/+merge/396787
Your team Ubuntu Development Team is requested to review the proposed merge of ~ddstreet/ubuntu-dev-tools:tox into ubuntu-dev-tools:master.