RFR: 8282280: Update Xerces to Version 2.12.2

[Joe Wang]

Update to Xerces 2.12.2.

The update also fixes JDK-8144117. Added a test.

Tests: local XML tests passed. Tier2 running. Two JCK tests failed with this update. See related issue report.

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Commit messages:
 - 8282280: Update Xerces to Version 2.12.2

Changes: https://git.openjdk.java.net/jdk/pull/8732/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=8732&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8282280
  Stats: 310 lines in 17 files changed: 296 ins; 3 del; 11 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8732.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8732/head:pull/8732

PR: https://git.openjdk.java.net/jdk/pull/8732