Added test to check XXE vulnerability.
Merge remote-tracking branch 'upstream/Branch_2_3' into Branch_2_3
[RESTEASY-1125] JAXB MessageBodyReader providers not recognized when using generics in a complex inheritance structure
Remove duplicated test
Merge pull request #613 from kanovotn/Branch_2_3

RESTEASY-1125: adding test to arquillian/RESTEASY-TEST-EAP