[Merge] lp:~jonas-drange/ubuntu-settings-components/fix-freeing-of-jobs into lp:~phablet-team/ubuntu-settings-components/printer-components

[Andrew Hayzen]

Review: Approve

LGTM, this fixes the issue of having the app crashing on startup when jobs already exist in the queue.
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https://code.launchpad.net/~jonas-drange/ubuntu-settings-components/fix-freeing-of-jobs/+merge/317632
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