Added creation time to SessionInfo

src/main/java/de/thm/arsnova/entities/SessionInfo.java

@@ -28,6 +28,7 @@ public class SessionInfo {
 	private String keyword;
 	private boolean active;
 	private String courseType;
+	private long creationTime;
 	
 	private int numQuestions;
 	private int numAnswers;
@@ -40,6 +41,7 @@ public class SessionInfo {
 		this.keyword = session.getKeyword();
 		this.active = session.isActive();
 		this.courseType = session.getCourseType();
+		this.creationTime = session.getCreationTime();
 	}
 	
 	public static List<SessionInfo> fromSessionList(List<Session> sessions) {
@@ -121,4 +123,12 @@ public class SessionInfo {
 	public void setNumUnanswered(int numUnanswered) {
 		this.numUnanswered = numUnanswered;
 	}
+	
+	public long getCreationTime() {
+		return creationTime;
+	}
+
+	public void setCreationTime(long creationTime) {
+		this.creationTime = creationTime;
+	}
 }