LPS-50479 Refactor "new SAXParser()" into SecureXMLBuilder.newXMLReader()
LPS-50479 Secure JAXB + JAXP initialization, from now all DTD based XMLs cannot be validated
LPS-50479 Apply to XSL Content portlet
LPS-50479 Update Source Formatter
LPS-50479 JUnit tests
LPS-50479 Update xml.xsd to the newest version to allow XSD validation with disabled DTD
LPS-50479 Introduce insecure methods for trusted sources allowing DTD validation
LPS-50479 Introduce trusted sources into SAXReaderImpl
LPS-50479 Implement insecure parsing for trusted sources
LPS-50479 Trust all xmls = reopen the XML vulnerabilities for now. We need it now to be able to start portal and do some peer reviews