[Merge] ~vorlon/ubuntu-dev-tools:pm-helper into ubuntu-dev-tools:main

[Benjamin Drung]

This script has zero test cases which makes maintaining it hard. I would expect new code to come with test cases.
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https://code.launchpad.net/~vorlon/ubuntu-dev-tools/+git/ubuntu-dev-tools/+merge/444677
Your team Ubuntu Core Development Team is requested to review the proposed merge of ~vorlon/ubuntu-dev-tools:pm-helper into ubuntu-dev-tools:main.