[Merge] ~paelzer/ubuntu-seeds/+git/ubuntu:disco-remove-libdpdk-dev-from-auto-promotion into ~ubuntu-core-dev/ubuntu-seeds/+git/ubuntu:disco

[Steve Langasek]

Review: Approve

Approved. Please merge yourself so I don't have to futz with git remotes :)
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https://code.launchpad.net/~paelzer/ubuntu-seeds/+git/ubuntu/+merge/362656
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