Integrated: Ensure that GitLab approvals are processed in the correct order

[Robin Westberg]

The reviews() call should return reviews in descending chronological order, ensure that GitLab approvals are sorted correctly.

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

Commit messages:
 - Ensure that GitLab approvals are processed in the correct orders

Changes: https://git.openjdk.java.net/skara/pull/978/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=978&range=00
  Stats: 54 lines in 1 file changed: 2 ins; 0 del; 52 mod
  Patch: https://git.openjdk.java.net/skara/pull/978.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/978/head:pull/978

PR: https://git.openjdk.java.net/skara/pull/978