Allow to pass additional keyword arguments to transformation script

bt5/erp5_wendelin/SkinTemplateItem/portal_skins/erp5_wendelin/DataStream_readChunkListAndTransform.xml

@@ -71,7 +71,8 @@ if transform_script_id is not None:\n
     start, end = transform_script(context, data_stream_chunk_list, \\\n
                                   start, \\\n
                                   end, \\\n
-                                  data_array_reference)\n
+                                  data_array_reference, \\\n
+                                  **kw)\n
 \n
 # [warning] store current position offset in Data Stream, this can cause easily \n
 # ConflictErrors and it spawns re-index activities on DataStream. Thus \n
@@ -92,14 +93,15 @@ data_stream.activate().DataStream_readChunkListAndTransform( \\\n
     end, \\\n
     chunk_length, \\\n
     transform_script_id,\n
-    data_array_reference)\n
+    data_array_reference,\n
+    **kw)\n
 
 
 ]]></string> </value>
         </item>
         <item>
             <key> <string>_params</string> </key>
-            <value> <string>start, end, chunk_length, transform_script_id=None, data_array_reference=None</string> </value>
+            <value> <string>start, end, chunk_length, transform_script_id=None, data_array_reference=None, **kw</string> </value>
         </item>
         <item>
             <key> <string>id</string> </key>

bt5/erp5_wendelin/SkinTemplateItem/portal_skins/erp5_wendelin/DataStream_transform.xml

@@ -64,12 +64,15 @@ context.activate().DataStream_readChunkListAndTransform( \\\n
   end, \\\n
   chunk_length, \\\n
   transform_script_id, \\\n
-  data_array_reference)\n
+  data_array_reference,\\\n
+  **kw)\n
+\n
+return data_length\n
 </string> </value>
         </item>
         <item>
             <key> <string>_params</string> </key>
-            <value> <string>chunk_length=1048576, transform_script_id=None, data_array_reference=None</string> </value>
+            <value> <string>chunk_length=1048576, transform_script_id=None, data_array_reference=None, **kw</string> </value>
         </item>
         <item>
             <key> <string>id</string> </key>