Prepare development v1.8.4-SNAPSHOT
Merge release/v1.8.3 into master
Release v1.8.3
Drop unreleased old composite key format from remote-remove receiver
Use marker prefix for unambiguous composite remote-remove keys
Fix remote remove fallback for dotted plain keys and unpackaged key classes
Fix remote cache remove: propagation, key converter matching and colon parsing
Review cache remote communication: propagation, performance and resilience fixes