RFR: Allow reading the resolution property in Jira issues

[Robin Westberg]

Hi all,

Please review this change that makes the `resolution` property available for reading in a Jira issue. It cannot be set,
as it is special (can only be set when transitioning an issue).

Best regards,
Robin

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Commit messages:
 - Allow reading the resolution property

Changes: https://git.openjdk.java.net/skara/pull/504/files
 Webrev: https://webrevs.openjdk.java.net/skara/504/webrev.00
  Stats: 7 lines in 1 file changed: 4 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/skara/pull/504.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/504/head:pull/504

PR: https://git.openjdk.java.net/skara/pull/504