JBIDE-18721: Adds new Saxon-HE version 9.5.1.6j

* New Teiid client in Teiid Designer requires this saxon upgrade to be in
  sync with the dependencies of the Teiid Server

* Source from 9.5.1.6j release copied in

* org.apache.xml.resolver copied in from xml-resolver 1.2 jar which is
  a dependency of the built maven jar. This satisfies class dependencies
  for the class net/sf/saxon/trans/XmlCatalogResolver

* Dependencies for this library outlined here:
  http://repo1.maven.org/maven2/net/sf/saxon/Saxon-HE/9.5.1-6/Saxon-HE-9.5.1-6.pom