[Merge] lp:~canonical-platform-qa/camera-app/fix1444170-flake8 into lp:camera-app

[Leo Arias]

Initial cleanup to make the tests more readable and maintainable.
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https://code.launchpad.net/~canonical-platform-qa/camera-app/fix1444170-flake8/+merge/257805
Your team Ubuntu Phablet Team is requested to review the proposed merge of lp:~canonical-platform-qa/camera-app/fix1444170-flake8 into lp:camera-app.