RFR: 1907: Notifiers should not be stopped due to temporary issue failure when pr is integrated

[Zhao Song]

In SKARA-1899, we stopped all notifiers if the bot found temporary issue failure because we think it's just temporary issue failure and once the failure got resolved, the notifiers will be triggered again. However, it will introduce a new problem. If the pr is integrated when the temporary issue failure is happening, the notifiers will not be trigger again because the pr bot will not update integrated pr body.

In this patch, the conditions for stopping notifiers have been tightened.

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Commit messages:
 - SKARA-1907

Changes: https://git.openjdk.org/skara/pull/1518/files
 Webrev: https://webrevs.openjdk.org/?repo=skara&pr=1518&range=00
  Issue: https://bugs.openjdk.org/browse/SKARA-1907
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/skara/pull/1518.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1518/head:pull/1518

PR: https://git.openjdk.org/skara/pull/1518