[crac] RFR: Do not add generic native checkpoint error in dry runs

[Radim Vansa]

When a Resource throws an exception we still enter the checks in native code. In such cases the native code should return successful status if there are no further errors found.

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Commit messages:
 - Do not add generic native checkpoint error in dry runs

Changes: https://git.openjdk.org/crac/pull/80/files
 Webrev: https://webrevs.openjdk.org/?repo=crac&pr=80&range=00
  Stats: 83 lines in 2 files changed: 78 ins; 1 del; 4 mod
  Patch: https://git.openjdk.org/crac/pull/80.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/80/head:pull/80

PR: https://git.openjdk.org/crac/pull/80