RFR: 1050: Gitlab MR stuck on missing issue when unbreakable space in PR title

[Erik Joelsson]

This patch makes the PR title parser able to handle non-breakable space between the bug ID and the bug title. If a user manages to get one of those in there, we currently end up in a limbo state that is very tricky to diagnose.

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Commit messages:
 - SKARA-1050

Changes: https://git.openjdk.java.net/skara/pull/1200/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=1200&range=00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-1050
  Stats: 50 lines in 2 files changed: 49 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/skara/pull/1200.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1200/head:pull/1200

PR: https://git.openjdk.java.net/skara/pull/1200