RFR: 2348: Don't apply the logic of avoidForwardports if the issue has been resolved [v2]

[Zhao Song]

> In [SKARA-2226](https://bugs.openjdk.org/browse/SKARA-2226), the issueNotifier was enhanced to avoid creating forward ports. However, there is a bug related with this feature. If the main issue has already been resolved and the fixVersion is targeted to release N-1, the issueNotifier will change the fixVersion to release N and create an open backport issue target to release N-1. The correct behavior should be to leave the main issue unchanged, create a backport target to release N, and resolve it accordingly.

Zhao Song has updated the pull request incrementally with one additional commit since the last revision:

  add a test

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Changes:
  - all: https://git.openjdk.org/skara/pull/1683/files
  - new: https://git.openjdk.org/skara/pull/1683/files/15706634..e478dac4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1683&range=01
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1683&range=00-01

  Stats: 63 lines in 1 file changed: 63 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/skara/pull/1683.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1683/head:pull/1683

PR: https://git.openjdk.org/skara/pull/1683