table pull_request wasn't updated correctly (#2649)

* Fix: table `pull_request` won't be updated correctly

* Update also status column when manually merged

Author: kaz

models/pull.go

@@ -422,7 +422,7 @@ func (pr *PullRequest) setMerged() (err error) {
 	if err = pr.Issue.changeStatus(sess, pr.Merger, pr.Issue.Repo, true); err != nil {
 		return fmt.Errorf("Issue.changeStatus: %v", err)
 	}
-	if _, err = sess.ID(pr.ID).Cols("has_merged").Update(pr); err != nil {
+	if _, err = sess.ID(pr.ID).Cols("has_merged, status, merged_commit_id, merger_id, merged_unix").Update(pr); err != nil {
 		return fmt.Errorf("update pull request: %v", err)
 	}