Comment 3 for bug 1927996

[Impact]
Because update-notifier does not explicit have the `lsb-release` package as a dependency, users may install the package and rely on `apt-cdrom-check` to work, but it will fail, since it runs
the `lsb_release -sr` command on it.

[Test case]

To reproduce the issue:

1. Launch a xenial container
2. Install update-notifier on it
3. Run apt-cache depends update-notifier-common
4. Verify that lsb-release does not appear

To verify that the error is fixed:

1. Install the new update-notifier from this ppa:
https://launchpad.net/~lamoura/+archive/ubuntu/update-notifier-test-ppa/
2. Run apt-cache depends update-notifier-common
3. Verify that lsb-release will now appear as a dependency

[Where problems could occur]

We are only adding a missing dependency to the package. I cannot think of a problem that this might cause to the users of this package.

[Discussion]

We can verify that `apt-cdrom-check` does make use of the `lsb_release` command. Since we don't have that dependency on the package control file, errors can appear when users are executing/relying on that script.