[WFLY-3600] Always copy the original cause from the exception; use a consistent approach
Merge pull request #6749 from dmlloyd/wfly-3600

[WFLY-3600] Always copy the original cause from the exception; use a consistent approach
Remove usage of deprecated urn:clustering:1.0 schema.
Merge pull request #6752 from pferraro/master

Remove usage of deprecated urn:clustering:1.0 schema