[crac] RFR: 8346768: [CRaC] Ignore errors parsing classpath

[Timofei Pushkin]

CRaC's classpath parsing now ignores exceptions being thrown when parsing the paths.

`ClasspathParseTest` is extended to test the failure does not occur at least on Windows (no test case was found to trigger `new File(...).toPath()` exceptions on other platforms).

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Commit messages:
 - 8346768: [CRaC] Ignore errors parsing classpath

Changes: https://git.openjdk.org/crac/pull/168/files
  Webrev: https://webrevs.openjdk.org/?repo=crac&pr=168&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8346768
  Stats: 45 lines in 2 files changed: 28 ins; 0 del; 17 mod
  Patch: https://git.openjdk.org/crac/pull/168.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/168/head:pull/168

PR: https://git.openjdk.org/crac/pull/168