Fix tslint errors

src/app/messages/messages.component.ts

@@ -16,7 +16,7 @@ export class MessagesComponent implements OnInit {
   newMessage: Subject<MessageData> = new Subject<MessageData>();
   messageInQueue = true;
 
-  originator: string = 'avataobot';
+  originator = 'avataobot';
   messages: MessageData[] = [];
   messageQueueAttender: MessageQueueAttender;