RFR (JAXP): 8054196: XPath: support any type

[huizhe wang]

Hi,

This is to add support for any type and improvement with new features 
reflected in the new evaluateExpression methods, XPathEvaluationResult 
and XPathNodes.

https://bugs.openjdk.java.net/browse/JDK-8054196
http://cr.openjdk.java.net/~joehw/jdk9/8054196/webrev/

Thanks,
Joe