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PersistentState Service TODO
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- The file /org/openorb/pss/connector/file/TransactionalDataManagerSerializable
  usese the methods Thread.resume()/Thread.suspend() which have been deprecated
  because of deadlock-problems.

- Make the data store creation use a default folder like
   /tmp/OpenORB/PSS/<app-id> !?
   ~/.OpenORB
   For the precise order, see the Service framework.