Botond Dénes 021feef513 querier_cache: simplify memory eviction use-after-free fix, add tests ...

Simplify the fix for memory based eviction, introduced by 918d255 so
there is no need to massage the counters.

Also add a check to `test_memory_based_cache_eviction` which checks for
the bug fixed. While at it also add a check to
`test_time_based_cache_eviction` for the fix to time based eviction
(e5a0ea3).

Tests: tests/querier_cache:debug
Signed-off-by: Botond Dénes <bdenes@scylladb.com>
Message-Id: <c89e2788a88c2a701a2c39f377328e77ac01e3ef.1546515465.git.bdenes@scylladb.com>

2019-01-03 13:44:08 +02:00

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