Mods to support Issue clased_at property (#164).

src/main/java/org/gitlab4j/api/models/Issue.java

@@ -18,6 +18,9 @@ public class Issue {
     private Author author;
     private Boolean confidential;
     private Date createdAt;
+    private Date updatedAt;
+    private Date closedAt;
+    private User closedBy;
     private String description;
     private Date dueDate;
     private Integer id;
@@ -28,7 +31,6 @@ public class Issue {
     private IssueState state;
     private Boolean subscribed;
     private String title;
-    private Date updatedAt;
     private Integer userNotesCount;
     private String webUrl;
     private TimeStats timeStats;
@@ -153,6 +155,22 @@ public class Issue {
         this.updatedAt = updatedAt;
     }
 
+    public Date getClosedAt() {
+        return closedAt;
+    }
+
+    public void setClosedAt(Date closedAt) {
+        this.closedAt = closedAt;
+    }
+
+    public User getClosedBy() {
+        return closedBy;
+    }
+
+    public void setClosedBy(User closedBy) {
+        this.closedBy = closedBy;
+    }
+
     public Integer getUserNotesCount() {
         return userNotesCount;
     }

src/test/java/org/gitlab4j/api/TestIssuesApi.java

@@ -202,6 +202,26 @@ public class TestIssuesApi {
         assertEquals(issue.getId(), closedIssue.getId());
     }
 
+    @Test
+    public void testCloseIssueClosedAt() throws GitLabApiException {
+
+        assertNotNull(testProject);
+        Integer projectId = testProject.getId();
+        Issue issue = gitLabApi.getIssuesApi().createIssue(projectId, getUniqueTitle(), ISSUE_DESCRIPTION);
+        assertNull(issue.getClosedAt());
+        assertNull(issue.getClosedBy());
+
+        Issue closedIssue = gitLabApi.getIssuesApi().closeIssue(projectId, issue.getIid());
+        assertNotNull(closedIssue);
+        assertEquals(IssueState.CLOSED, closedIssue.getState());
+        assertEquals(issue.getId(), closedIssue.getId());
+
+        closedIssue = gitLabApi.getIssuesApi().getIssue(projectId, issue.getIid());
+        assertNotNull(closedIssue);
+        assertEquals(IssueState.CLOSED, closedIssue.getState());
+        assertNotNull(closedIssue.getClosedAt());
+    }
+
     @Test
     public void testDeleteIssue() throws GitLabApiException {
 

src/test/resources/org/gitlab4j/api/issue.json

@@ -32,6 +32,14 @@
    "title" : "Ut commodi ullam eos dolores perferendis nihil sunt.",
    "updated_at" : "2016-01-04T15:31:46.176Z",
    "created_at" : "2016-01-04T15:31:46.176Z",
+   "closed_at" : "2016-01-05T15:31:46.176Z",
+   "closed_by" : {
+      "state" : "active",
+      "web_url" : "https://gitlab.example.com/root",
+      "username" : "root",
+      "id" : 1,
+      "name" : "Administrator"
+   },
    "subscribed": false,
    "user_notes_count": 1,
    "web_url": "http://example.com/example/example/issues/1",