RFR: 1217: ProblemList errors should not prevent a PR from being rfr

[Zhao Song]

In this patch, `ProblemListsIssue` will not prevent a PR from being ready for review(rfr) any more.

Also added `testProblemListsIssue` to test this behavior.

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Commit messages:
 - Formatted testProblemListsIssue
 - Formatted testProblemListsIssue
 - SKARA-1217

Changes: https://git.openjdk.org/skara/pull/1410/files
 Webrev: https://webrevs.openjdk.org/?repo=skara&pr=1410&range=00
  Issue: https://bugs.openjdk.org/browse/SKARA-1217
  Stats: 53 lines in 2 files changed: 51 ins; 1 del; 1 mod
  Patch: https://git.openjdk.org/skara/pull/1410.diff
  Fetch: git fetch https://git.openjdk.org/skara pull/1410/head:pull/1410

PR: https://git.openjdk.org/skara/pull/1410