add test dep on debian-archive-keyring
The debian-archive-keyring package is not installed by default in Ubuntu images so the debvm autopkgtests in Ubuntu are always failing. This resolves that issue by adding a testdep on debian-archive-keyring.
The debian-archive-keyring package is not installed by default in Ubuntu images so the debvm autopkgtests in Ubuntu are always failing. This resolves that issue by adding a testdep on debian-archive-keyring.