updated release notes
updated version to 2.3.0.CR1
Revert "updated version to 2.3.0.CR1"

This reverts commit e7fb496b44f5b2268285e5a536108e147629e9d2.
Merge pull request #799 from andytaylor/master

version update for release
HORNETQ-1119 Add note about backup-cluster-name.