Merge pull request #756 from FranciscoBorges/smallFixes

Small fixes that accumulated while revising paging locks
HORNETQ-1102 Take the locks in the right order.
Move Journal Record IDs constants into its own class.
Merge pull request #757 from FranciscoBorges/master

HORNETQ-1102 Take the locks in the right order.
Replace all "/* (non-Javadoc)\n* @see ETC */" with @Override:
- Delete all unused methods not overriding anything;
- Reduce visibility when possible

FYI, regular expression used was:
/\* \(non-Javadoc\)\R    \* @see [\p{Alpha}\p{Digit}\p{Punct}\p{Blank}]*\R    \*/\R[\s\t]*public
REPLACED WITH
@Override\R   public
Merge pull request #758 from FranciscoBorges/master

Replace all "/* (non-Javadoc)\n* @see ETC */" with @Override:
[HORNETQ-1103] Upgrade Netty to fix SSL race. Also maximal wait 30 seconds for the handshake to complete
Merge pull request #750 from normanmaurer/master_ssl_fix

[HORNETQ-1103] Upgrade Netty to fix SSL race. Also maximal wait 30 secon...
Remove old code that is not needed anymore with newer Netty versions.

This code also produced a deadlock with 3.6.0.Final and later as the
VirtualExecutorService.awaitTermination(..) has a bug which is triggered
by the new shutdown logic which was introduced with 3.6.0.Final.
Merge pull request #760 from normanmaurer/shutdown_hang

Remove old code that is not needed anymore with newer Netty versions.
update jgroups to latest
cluster connection should pulse its live update to make sure no one missed it
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()