Template extension spring configuration support

- similar pattern to existing script bean extension support
 - new root model helper objects and custom methods can be added via spring configuration
Cleanup of script extension spring support
Fix to thread safety of configured script extension beans that use the Scopable interface

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5369 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/template/DateIncrementMethod.java

@@ -34,10 +34,8 @@ import freemarker.template.TemplateNumberModel;
 
 /**
  * @author Roy Wetherall
- * 
- 
  */
-public final class DateIncrementMethod implements TemplateMethodModelEx
+public class DateIncrementMethod extends BaseTemplateExtensionImplementation implements TemplateMethodModelEx
 {
     /**
      * @see freemarker.template.TemplateMethodModel#exec(java.util.List)