WFLY-3848 Upgrade JGroups to 3.4.6.Final
WFLY-2772 Leverage JGroups FORK to consolidate EE channels
Fix deprecated usage of HttpClient API.
Make sure we unregister the override model in ChannelRemoveHandler.
Merge pull request #6736 from pferraro/fork

WFLY-2772 Leverage JGroups FORK protocol to consolidate EE channels