The code path when rsyslog_in_image=true is not tested.

[nhosoi]

The issue was brought up in testing the value of rsyslog_version. Instead of checking the value itself, we should test the behaviour derived from the value. But the scenario is only available when rsyslog_in_image=true, which test environment is missing now.

For more details, please see the discussion starting with: https://github.com/linux-system-roles/logging/pull/91#issuecomment-598346789