Code Review Request: 8011547 : Update XML Signature implementation to Apache Santuario 1.5.4

[Sean Mullan]

Hi Xuelei,

Please review my JDK 8 code changes to bring our XML Signature 
implementation up-to-date with Apache Santuario version 1.5.4.

The changes are extensive, but many of them are simple formatting or 
refactoring changes. Any questions, let me know.

http://cr.openjdk.java.net/~mullan/webrevs/8011547/webrev.00/

Thanks,
Sean