Fix cache_misses

[avbelov23]

test_purge by request: miss, miss, hit, hit, purge, miss, miss, hit, hit

test_purge_get_basic by request: miss, miss, hit, hit, cache, hit, miss, hit

test_purge_get_garbage by request: miss, hit, purge, miss, hit, purge, miss, hit

test_purge_get_uncached by request: cache, hit

test_purge_get_uncacheable by request: miss, hit, not cache (Cache-Control: private), miss, miss