RFR: 2373: Support repo-<project> style fix versions [v2]

[Erik Joelsson]

> This patch adds parsing logic for handling version strings on the form "repo-<project>". This form is commonly used in JBS for project repos, but Skara is currently unable to actually parse them.

Erik Joelsson has updated the pull request incrementally with one additional commit since the last revision:

  Review comment

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Changes:
  - all: https://git.openjdk.org/skara/pull/1686/files
  - new: https://git.openjdk.org/skara/pull/1686/files/a482e449..96bbf720

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1686&range=01
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1686&range=00-01

  Stats: 3 lines in 1 file changed: 2 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/skara/pull/1686.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1686/head:pull/1686

PR: https://git.openjdk.org/skara/pull/1686