Merge pull request #572 from ronsigal/master

RESTEASY-1103
Revert "RESTEASY-1103"
Merge pull request #573 from resteasy/revert-572-master

Revert "RESTEASY-1103"
bump jackson version
minor fix
Merge pull request #574 from patriot1burke/master

bump jackson version
RESTEASY-1103: Restoring PR #572, imposing XML security constraints.