RFR: 176: git-pr should promote usage of git-publish

[Erik Helin]

Hi all,

pleaser review this small pull request that promotes usage of `git publish`
instead of `git push --set-upstream`.

Testing:
- [x] Tested live while demoing features

Thanks,
Erik

-------------

Commits:
 - 06d2e44f: 176: git-pr should promote usage of git-publish

Changes: https://git.openjdk.java.net/skara/pull/286/files
 Webrev: https://webrevs.openjdk.java.net/skara/286/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-176
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/skara/pull/286.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/286/head:pull/286

PR: https://git.openjdk.java.net/skara/pull/286