Remove: "compareJournals" and ReplicationCompareDataMessage

both were part of replication's previous implementation and were not
used at all in the current implementation.
HORNETQ-720 Sort out the live.stop() order:

1. live.stop()
2. freeze all connections
   - if replicating keep that channel open
3. close all server sessions
4. close pagingManager
5. close storageManager

Now, the replicationManager is still open when the storagemanager closes, so
- it gets the "persist ID" value
- storageManager.stop() will send "LIVE_IS_STOPPING" msg
HORNETQ-720 Always do a "lineUp" for replication packets