Merge of all UI clustering changes originally applied to 2.2

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@8292 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/jcr/dictionary/JCRNamespacePrefixResolver.java

@@ -42,6 +42,8 @@ import org.alfresco.service.namespace.NamespaceService;
  */
 public class JCRNamespacePrefixResolver implements NamespaceService
 {
+    private static final long serialVersionUID = -2451839324143403283L;
+
     // delegate
     private NamespacePrefixResolver delegate;