#22874 Updated version in pom files to 6.0.0-SNAPSHOT

* Updated properties for glassfish-version.properties to 6 and 0.
* Updated copyright to 2020 in files touched.
* Updated Jenkinsfile and readme

Signed-off-by: arjantijms arjan.tijms@gmail.com

appserver/jdbc/templates/pom.xml

diff --git a/appserver/jdbc/templates/pom.xml b/appserver/jdbc/templates/pom.xml
index c436c39..c58a2a6 100644
--- a/appserver/jdbc/templates/pom.xml
+++ b/appserver/jdbc/templates/pom.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
 
-    Copyright (c) 2010, 2019 Oracle and/or its affiliates. All rights reserved.
+    Copyright (c) 2010, 2020 Oracle and/or its affiliates. All rights reserved.
 
     This program and the accompanying materials are made available under the
     terms of the Eclipse Public License v. 2.0, which is available at
@@ -21,7 +21,7 @@
     <parent>
         <groupId>org.glassfish.main.jdbc</groupId>
         <artifactId>jdbc</artifactId>
-        <version>5.1.0-SNAPSHOT</version>
+        <version>6.0.0-SNAPSHOT</version>
     </parent>
 
     <modelVersion>4.0.0</modelVersion>