Starting with Debian 11 (bullseye), security packages are in
bullseye-security as opposed to older releases like buster/updates.
List the last several stable releases in hopes nobody is trying to
use this role to configure platforms older than Debian 8 (jessie,
the current "oldoldstable").
A followup change demonstrates this works in the test-base-roles
job, but because the job matrices have to be updated in one fell
swoop, and many of those jobs won't work without this change already
merged (due to protected use in our base job), it's not tested
directly within this change.
Change-Id: I2d7712cbfd037a65b9025980a6c0cccd917f8947
750be2e2de