ISPN-4696 SuspectException kills operation on ClusterRegistryImpl

* Added retry for ClusterRegistry operations

https://issues.jboss.org/browse/ISPN-4696

Note this is only a stop gap solution for the time being since we do not know yet how we want to fully handle nodes leaving during a commit.  At least with the ClusterRegistry we know we can easily retry the command.
Hrmm, interesting.  I could do that, might be able to condense some other places as well.  Let me take a look. Thanks!