Add xalan jars to fix issues with #1114

Jars downloaded from http://xalan.apache.org/xalan-j/downloads.html

@yokolet, @jvshahid, @flavorjones, @bbrowning

Does this look reasonable? I am one of the poor people that need to use the IBM JDK so I think this is the only solution. Running the tests locally gives me 3 errors. It seems like at least 1 of the errors is just a change in an exception message. Should I expect all of the tests to pass on jruby?