Remove @Version from created since it should not be updated

This also works around DATAJPA-582

samples/data-jc/src/main/java/samples/data/Message.java

@@ -34,7 +34,6 @@ public class Message {
     @NotEmpty(message = "Summary is required.")
     private String summary;
 
-    @Version
     private Calendar created = Calendar.getInstance();
 
     @OneToOne

samples/messages-jc/src/main/java/org/springframework/security/samples/data/Message.java

@@ -22,7 +22,6 @@ public class Message {
     @NotEmpty(message = "Summary is required.")
     private String summary;
 
-    @Version
     private Calendar created = Calendar.getInstance();
 
     public Long getId() {