Merge pull request #760 from normanmaurer/shutdown_hang

Remove old code that is not needed anymore with newer Netty versions.
update jgroups to latest
Merge pull request #761 from andytaylor/master

cluster connection improvement
Merge pull request #762 from gaohoward/master

update jgroups to latest
Maven: update plugins
Remove spurious comments
rename parameter to avoid confusion
Remove unused getter methods (which only make code inspection harder than necessary)
PagingManager and PagingStoreFactory do not use the PostOffice reference
Remove PostOffice.getPagingManager() as everywhere using it had access to server.getPagingManager()
Remove PagingStoreFactory.setStorageManager(...)
Remove hard coded version. Use "Version" class to set it.
Merge pull request #763 from FranciscoBorges/master

Mostly dead code deletion. Also fixed hard-coded version String
make sure jgroups uses IPV4 (or IPV6) to fix jgroups discovery test failures on some machines
fix log message format

* do not use quote with MESSAGE_FORMAT format
Merge pull request #765 from jmesnil/patch-3

fix log message format
Merge pull request #764 from gaohoward/master

fix jgroups test failures 
Delete dead code from hornetq-server
Remove all unused methods from HornetQMessageBundle
Remove all unused (and unreleased) server logger methods