[8u] RFR: backport of 8231507: Update Apache Santuario (XML Signature) to version 2.1.4

[Elliott Baron]

Hi Fedor,

On 2019-12-10 1:35 p.m., Fedor wrote:
> Hello everybody,
> 
> May I have a request backport of JDK-8231507?
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8231507
> webrev: http://cr.openjdk.java.net/~fijiol/8231507/webrev.8u.00/
> testing:  jdk/test/com/sun/org/apache/xml/ jdk/test/javax/xml/crypto/dsig/
> 
> The code of library taken from jdk14 sources wasn't applied cleanly to 
> jdk8u, so a sort of changes were done:
> 
> The changes made after copying files from jdk14:
> http://cr.openjdk.java.net/~fijiol/8231507/webrev.8u.00/compare/with-14.html 
> (raw diff: 
> http://cr.openjdk.java.net/~fijiol/8231507/webrev.8u.00/compare/with-14.diff) 
> 
> 
> Several files were deleted.
> The rest was taken "as is" from jdk14.
> 

This changeset appears to include parts of several dependent changes 
along with it. I recognize "8177334: Update xmldsig implementation to 
Apache Santuario 2.1.1" and some of its dependencies, since I've been 
working on a backport for this. If it's not possible to propose each of 
these additional changes for review individually, would you be able to 
list these dependencies that you have included in this changeset? It 
would also be helpful if you could provide an explanation for any 
modifications you had to make to these fixes to arrive at your 8u backport.

(Note: I'm not an 8u reviewer, just interested in getting this 
backported as well)

Thanks,
Elliott