ISPN-4565 ReplTotalOrderVersionedStateTransferTest.testStateTransfer ran...

...dom failures

* fix NPE:CommitCommand should not trigger the PrepareCommand.
* fix timeout: CacheTopologyControlCommand should be processed in the deliver thread

https://issues.jboss.org/browse/ISPN-4565
`preserveOrder` is `!OOB`, I think it would be easier to remove the OOB flag when sending the command.(`ClusterTopologyManager.executeOnClusterAsync`)