[jdk25u] RFR: 8367133: DTLS: fragmentation of Finished message results in handshake failure

[Nibedita Jena]

Clean backport

-------------

Commit messages:
 - Backport 80cb0ead502ae439660f2a3bbab42df4da39d9d6

Changes: https://git.openjdk.org/jdk25u/pull/275/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u&pr=275&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8367133
  Stats: 78 lines in 2 files changed: 75 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk25u/pull/275.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/275/head:pull/275

PR: https://git.openjdk.org/jdk25u/pull/275