FIX Ensure queeudjobs are updated when duplicated

Fixed a bug where duplicating a page would leave any embargo/expiry queuedjobs
attached to the new content, which would mean multiple content items
attached to a single queued job, and if one was changed, the job would
be deleted and that content would no longer publish
Merge pull request #118 from nyeholt/master

FIX Ensure queeudjobs are updated when duplicated