"This has plainbox-service require minimum versions of python3-plainbox and plainbox.
This is to ensure that upgrades on systems which already had plainbox-*
packages bring those minimum versions, because they contain a critical fix.
plainbox-service is in turn depended on by driver-testing, so if https://code.launchpad.net/~roadmr/checkbox-ihv-ng/packaging-new-version-fix is merged, it will mean that installing driver-testing will also upgrade the chain of plainbox packages (plainbox-service -> plainbox -> python3-plainbox) to the minimum requested versions.
For the record, I'm somewhat unhappy with this solution as it will be a bit hard to maintain, but other than having driver-testing depend directly on plainbox and python3-plainbox, I couldn't think of anything better.
[r=sylvain-pineau][bug=1225121][author=roadmr]"