Simplified OperationService by removing methods (some unused, some not needed to be public)
Merge pull request #1517 from pveentjer/cleanup/operationservice-send-methods

Simplified OperationService by removing methods (some unused, some not n...
Fixed build again on OpenJDK8 due to Nashorn JavaScript Engine
Fixed event ADDED / UPDATE and fixed unittest on ReplicatedMap
Resolved CompletableFuture conflict
Merge branch 'master' of https://github.com/hazelcast/hazelcast