Better debugging and toString() methods for GetChildCannedQuery (found while investigating ALF-10224)

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@30385 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/node/getchildren/GetChildrenCannedQuery.java

@@ -645,6 +645,12 @@ public class GetChildrenCannedQuery extends AbstractCannedQueryPermissions<NodeR
             this.propVals = propVals;
         }
         
+        @Override
+        public String toString()
+        {
+            return "FilterSortNode [nodeRef=" + nodeRef + ", propVals=" + propVals + "]";
+        }
+
         public NodeRef getNodeRef()
         {
             return nodeRef;