Commit
c17ac426082b2eca802dd1b2e1bb9b4b4b291199 changed some tests to
wait for "zone_needdump" messages instead of "sending notifies", because
notifies are rate limited and "zone_needdump" happen on every change.
However, inspecting the logs, the "zone_needdump" changes happen more
than once (likely because the re-signing is done in batches):
received control channel command 'sign step3.zsk-prepub.manual'
zone_journal: zone step3.zsk-prepub.manual/IN (signed): enter
zone_needdump: zone step3.zsk-prepub.manual/IN (signed): enter
zone_journal: zone step3.zsk-prepub.manual/IN (signed): enter
zone_needdump: zone step3.zsk-prepub.manual/IN (signed): enter
zone_journal: zone step3.zsk-prepub.manual/IN (signed): enter
zone_needdump: zone step3.zsk-prepub.manual/IN (signed): enter
zone step3.zsk-prepub.manual/IN (signed): sending notifies
This means we are running the rollover step checks too fast in some
test runs.
Revert the wait for log change for the rollover-zsk-prepub test.