The original "test_schema_digest_does_not_change" test case ensures
that schema digests will match for older nodes that do not support
all the features yet (including computed columns).
The additional case uses sstables generated after CDC was enabled
and a table with CDC enabled is created,
in order to make sure that the digest computed
including CDC column does not change spuriously as well.
Signed-off-by: Piotr Jastrzebski <piotr@scylladb.com>
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