[8u] RFR: backport of 8193830: Xalan Update: Xalan Java 2.7.2

[Simon Tooke]

This backport doesn't seem to actually update Xalan, but it does fix
xslt transforms in some locales.

I had to modify the test code to run (successfully) in 8u, and I did
change one indexOf(":") to indexOf(':') for consistency, but other than
that it was a fairly clean port.  Passes all the tests in javax.xml,
including the new one.

Issue: https://bugs.openjdk.java.net/browse/JDK-8193830

Webrevs: http://cr.openjdk.java.net/~stooke/webrevs/jdk-8193830/

(jaxp repo for fixes, jdk repo for new unit test)

Is it good?

-Simon