Fixes #3882, honor query cache config
Clean forgotten lines
Packet cleanup

Removed the bytebuffer stored in the Packet. Data is now directly
copied into the data.bytearray instead of into an intermediate
buffer.

Simplified code
Test fixes
"Configuring Hi-Density Memory Store" section added to "Storage" documentation
Added missing blacklist check in TcpIpJoiner.isThisNodeMasterCandidate()
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