RFR: 2272: Improve issuestitleCheck

[Zhao Song]

IssuestitleCheck was enabled in jdk recently, but this seems triggers too many false positive warnings and makes people feel annoying.

In this patch, I am trying to make the issuestitle check more tolerant. For some known cases, issuestitle check wouldn't generate issues.

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Commit messages:
 - SKARA-2272

Changes: https://git.openjdk.org/skara/pull/1653/files
  Webrev: https://webrevs.openjdk.org/?repo=skara&pr=1653&range=00
  Issue: https://bugs.openjdk.org/browse/SKARA-2272
  Stats: 38 lines in 2 files changed: 34 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/skara/pull/1653.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1653/head:pull/1653

PR: https://git.openjdk.org/skara/pull/1653