RFR: 574: git-info should use info from commit notifications [v4]

[Magnus Ihse Bursie]

> git-info should use info from commit notifications to get the link to the review, not JBS (since not all PR have issues)
> 
> This required refactoring to move the hosted repo logic from cli/pr/Utils.java to where it can be accessed by all CLI tools. After some deliberating, I left a bunch of trivial wrappers in cli/pr/Utils.java -- otherwise this change would have touched *all* the files in cli/pr.
> 
> Testing: ad hoc testing of "git info" on some arbitrary Skara commits.

Magnus Ihse Bursie has updated the pull request incrementally with one additional commit since the last revision:

  Fix trailing whitespace

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Changes:
  - all: https://git.openjdk.java.net/skara/pull/1011/files
  - new: https://git.openjdk.java.net/skara/pull/1011/files/50d82756..e947d950

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=skara&pr=1011&range=03
 - incr: https://webrevs.openjdk.java.net/?repo=skara&pr=1011&range=02-03

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/skara/pull/1011.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1011/head:pull/1011

PR: https://git.openjdk.java.net/skara/pull/1011