Update serve-stale test messages to include RRtype
Derived from isc-private/bind9!469. This MR only affects check
descriptions in the serve-stale
system test, so it can be safely
backported all the way to v9.16 as it does not change any logic.
Derived from isc-private/bind9!469. This MR only affects check
descriptions in the serve-stale
system test, so it can be safely
backported all the way to v9.16 as it does not change any logic.