RFR (JAXP): 8041523:Xerces Update: Serializer improvements from Xalan

[David Li]

Hi,

This is an update to JAXP serialization from Apache Xalan.  For details, 
please refer to: https://bugs.openjdk.java.net/browse/JDK-8041523.

Webrevs: http://cr.openjdk.java.net/~dli/8041523/webrev/

Summary of changes.
* Changes from the Apache bug referenced in JDK-8041523
* Update ToStream.setCdataSectionElements to a newer version from the 
most recent Apache ToStream.java source file.  This was causing the JCK 
test failures noted in the bug.  Note, there are two 
setCdataSectionElement methods in ToStream.java.  The one with the bug 
has been fixed.
* Some updates to accommodate ArrayList, HashMap, and Generics.
* Bundled in changes for JDK-8037259.  This was an xpointer bug.

Existing tests: JAXP SQE and unit tests passed.  JCK tests passed.

Thanks,
David