ISPN-4424 Synchronize updating cache entry and making a copy
ISPN-4424 Synchronize updating cache entry and making a copy
- making the CacheEntry immutable is not enough, the whole CacheEntry hierarchy needs to be made immutable
- using clone is simpler that making the hierarchy immutable
Fix LargeClusterStressTest to create clustered caches and check the data
perf testing hacks