RFR: 8275082: Update XML Security for Java to 2.3.0

Wed Dec 1 17:38:37 UTC 2021

Import Apache Santuario 2.3.0 without the secure validation changes since in OpenJDK we are using the `jdk.xml.dsig.secureValidationPolicy` security property for XML Signature secure validation protection.

Two commits are pushed:

- 2.3.0: Import 2.3.0 code changes
- revert: revert the Santuario secure validation changes

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Commit messages:
 - revert
 - 2.3.0

Changes: https://git.openjdk.java.net/jdk/pull/6644/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6644&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8275082
  Stats: 406 lines in 32 files changed: 54 ins; 267 del; 85 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6644.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6644/head:pull/6644

PR: https://git.openjdk.java.net/jdk/pull/6644