RFR 8219013: Update Apache Santuario (XML Signature) to version 2.1.3

[Weijun Wang]

Hi Sean,

Please take a review at

  https://cr.openjdk.java.net/~weijun/8219013/webrev.00/

Most of the changes are around 1) ECKeyValue 2) new BASE64 methods 3) XMLUtils.getFullTextChildrenFromNode. There are also quite a bunch of changes only including year and an apache-style $Id (Ex: DOMHMACSignatureMethod.java) because the previous JDK-8217878 fix had not updated the year.

What kind of noreg label I should choose? I am thinking of noreg-other with an explanation that this is a sync with upstream repo.

Thanks,
Max