Add operation to reset MessageAdded property
Merge pull request #1093 from mcadariu/newoperation

HORNETQ-1089 - implementation on reset MessageAdded Property
Fix maven warnings about overriding Netty's version.
HORNETQ-1209 HQ to require Java7.
HORNETQ-1217 Fix junit4 compilation with ambiguous calls.
HORNETQ-1217 Rename some classes to match standard naming conventions.