update gpg plugin version for archetypes

Change-Id: Ib8f3262eea7e4dd43ff64f3d738d7c7ae2a717a1

Author: Petr Bouda

archetypes/pom.xml

@@ -3,7 +3,7 @@
 
     DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 
-    Copyright (c) 2010-2015 Oracle and/or its affiliates. All rights reserved.
+    Copyright (c) 2010-2016 Oracle and/or its affiliates. All rights reserved.
 
     The contents of this file are subject to the terms of either the GNU
     General Public License Version 2 only ("GPL") or the Common Development
@@ -71,7 +71,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-gpg-plugin</artifactId>
-                        <version>1.1</version>
+                        <version>1.6</version>
                         <executions>
                             <execution>
                                 <id>sign-artifact</id>