WFLY-3246 Upgrade JGroups to 3.5
WFLY-3445 Allow custom protocol types in jgroups stack
Use routable non-reserved address range for ipv6 tests, e.g. ff13::/16
Fix domain tests with ipv6
Merge pull request #6805 from ctomc/clustering

WFLY-3246 Upgrade JGroups to 3.5 & ipv6 config improvments