OO-2589: pseudonym can be updated

src/main/java/org/olat/modules/fo/model/MessageImpl.java

@@ -100,7 +100,7 @@ public class MessageImpl implements CreateInfo, Persistable, Message {
 	@JoinColumn(name="forum_fk", nullable=false, insertable=true, updatable=false)
 	private Forum forum;
 
-	@Column(name="pseudonym", nullable=true, insertable=true, updatable=false)
+	@Column(name="pseudonym", nullable=true, insertable=true, updatable=true)
 	private String pseudonym;
 	@Column(name="guest", nullable=true, insertable=true, updatable=false)
 	private boolean guest;

src/main/java/org/olat/modules/fo/ui/MessageEditController.java

@@ -71,7 +71,6 @@ import org.olat.modules.fo.Forum;
 import org.olat.modules.fo.ForumCallback;
 import org.olat.modules.fo.ForumChangedEvent;
 import org.olat.modules.fo.ForumLoggingAction;
-import org.olat.modules.fo.ForumModule;
 import org.olat.modules.fo.Message;
 import org.olat.modules.fo.Pseudonym;
 import org.olat.modules.fo.manager.ForumManager;
@@ -127,8 +126,6 @@ public class MessageEditController extends FormBasicController {
 	@Autowired
 	private ForumManager fm;
 	@Autowired
-	private ForumModule forumModule;
-	@Autowired
 	private BaseSecurity securityManager;
 	@Autowired
 	private NotificationsManager notificationsManager;