Metrics PR review fixes

Author: ahornace

opengrok-web/src/main/java/org/opengrok/web/api/v1/RestApp.java

@@ -18,7 +18,7 @@
  */
 
 /*
- * Copyright (c) 2018, 2020 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018 Oracle and/or its affiliates. All rights reserved.
  */
 package org.opengrok.web.api.v1;
 

opengrok-web/src/main/java/org/opengrok/web/api/v1/controller/SuggesterController.java

@@ -18,7 +18,7 @@
  */
 
 /*
- * Copyright (c) 2018, 2020 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2019 Oracle and/or its affiliates. All rights reserved.
  * Portions Copyright (c) 2020, Chris Fraire <[email protected]>.
  */
 package org.opengrok.web.api.v1.controller;

opengrok-web/src/main/java/org/opengrok/web/servlet/MetricsServlet.java

@@ -34,6 +34,8 @@
 @WebServlet("/metrics/prometheus")
 public class MetricsServlet extends HttpServlet {
 
+    private static final long serialVersionUID = 0L;
+
     @Override
     protected void doGet(final HttpServletRequest req, final HttpServletResponse resp) throws IOException {
         try (PrintWriter pw = resp.getWriter()) {