RFR: cli: use label description for e-mail in git-pr-create [v2]

[Erik Helin]

> Hi all,
> 
> please review this small patch that uses the label description in `git pr create` to map the label to a mailing list.
> 
> Thanks,
> Erik

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

  Cleaned up code slightly

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

Changes:
  - all: https://git.openjdk.java.net/skara/pull/1091/files
  - new: https://git.openjdk.java.net/skara/pull/1091/files/1dcd1344..42c092b9

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=skara&pr=1091&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=skara&pr=1091&range=00-01

  Stats: 11 lines in 1 file changed: 6 ins; 2 del; 3 mod
  Patch: https://git.openjdk.java.net/skara/pull/1091.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1091/head:pull/1091

PR: https://git.openjdk.java.net/skara/pull/1091