- replaced 'firstWaiting mechanism' with a 'nextExpected mechanism' to avoid...

- replaced 'firstWaiting mechanism' with a 'nextExpected mechanism' to avoid polling on the working queue of the replication
- 'limiting mechanism' for the working queue of the replication added

git-svn-id: https://babudb.googlecode.com/svn/trunk@76 d4c7dd96-b7b2-11dd-893d-d98698f66bbf