RFR: 1456: hgupdate-sync labeling ignores suffix on 8u releases

[Erik Joelsson]

This patch adds a new concept to the hgupdate-sync label logic, which I had naively thought was already there. Any version string with an "opt" part (basically a -suffix) gets treated as a separate release stream. I think this makes sense and is easily understood, but I'm looking for more eyes and thoughts on this.

While working on it, an existing test started failing. I ended up removing it as I can't see how that test is relevant or even correct. AFAIK we never accept X-pool as fixVersion when an issue is resolved, and hgupdate-sync should only be considered for resolved or closed bugs. I think this test was based on trying to mimic the old labeler and happened to find a mislabeled set of bugs.

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Commit messages:
 - Fix comment
 - SKARA-1456

Changes: https://git.openjdk.java.net/skara/pull/1324/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=1324&range=00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-1456
  Stats: 37 lines in 2 files changed: 23 ins; 11 del; 3 mod
  Patch: https://git.openjdk.java.net/skara/pull/1324.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1324/head:pull/1324

PR: https://git.openjdk.java.net/skara/pull/1324