Don't set to "null" as that then creates a DefaultValidationEventHandler which prints things out to System.out.

git-svn-id: https://svn.apache.org/repos/asf/cxf/trunk@1546125 13f79535-47bb-0310-9956-ffa450edef68
Use our Stax XML parsing for all the parsing to prevent global locks on sax factories and provide more security

git-svn-id: https://svn.apache.org/repos/asf/cxf/trunk@1546126 13f79535-47bb-0310-9956-ffa450edef68