Chunk server: change remote sync state machine Create() method to always return shared pointer in order to ensure that
shared_from_this() always work. Implement chunk server access update with remote sync state machine. Update chunk server access with
replicator, write appender, client state machine, and in generic find method if the supplied chunk server access token is valid, and has
larger expiration time that the currently used token, and the currently used token is about to expire. Pass meta server access key to
the chunk recovery's meta server communication state machine.