[8u] RFR Backport 8177334: Update xmldsig implementation to Apache Santuario 2.1.1

[Andrew Hughes]

On 06:49 Mon 17 Aug     , Andrew Hughes wrote:
> 
> Let's get this in finally and kick the tyres on it. Please flag with
> jdk8u-fix-request.

Forgot to add; the THIRD_PARTY_README change will need to be duplicated
to the other repos... :-(

See Aleksey's recent backport of JDK-8046274 for an example.

It doesn't need additional review as the change is in this webrev, but
the file does need to be kept in sync.

Thanks,
-- 
Andrew :)

Senior Free Java Software Engineer
OpenJDK Package Owner
Red Hat, Inc. (http://www.redhat.com)

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