Comment 1 for bug 1915547

I will further increase this SRU bug with information that is lacking on from the original bug proposal:

[Impact]
During an upgrade from trusty to xenial, users will be prompted to make a decision regarding the diff on unattended-upgrades. This is not a good user experience, specially because the user can make an uninformed decision of keeping the old config file, which will make unattended-upgrades to not work as we expect.

[Test case]

To reproduce the isse, you can:

1. Launch a trusty vm
2. Perform a do-release-upgrade and observe that you will be prompted with the 50unattende-upgrades change

To verify that the error is fixed:

1. Launch a trusty vm
2. Import this ppa into the system:
   https://launchpad.net/~lamoura/+archive/ubuntu/unattended-upgrades-ppa
3. Configure do-release-upgrade to allow using third parties during upgrade
4. Run a do-release-upgrade
5. Verify the prompt is no longer there and that we end up with the expected 50unattended-upgrades
   config file

[Where problems could occur]

The changes is this package should only be surface during an upgrade operation. Because we are now delivering a new file to the system and configuring postinst to use it. Because of that, we believe this is the only scenario that could be affect in case of a regression is discovered in the package.

-------------------

Finally, if there is any additional information that I need to add to this SRU, just let me know and I will provide it