RFR: 8351113: RC2ParameterSpec throws IllegalArgumentException when offset is negative

[Mark Powers]

[JDK-8351113](https://bugs.openjdk.org/browse/JDK-8351113)

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Commit messages:
 - first iteration

Changes: https://git.openjdk.org/jdk/pull/24854/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24854&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8351113
  Stats: 6 lines in 1 file changed: 5 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/24854.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24854/head:pull/24854

PR: https://git.openjdk.org/jdk/pull/24854