adapt ingestion script to new parameter style

bt5/erp5_wendelin/PathTemplateItem/portal_callables/DataIngestionLine_writeFluentdIngestionToDataStream.py

-data_stream.appendData(''.join([c[1] for c in context.unpack(data_chunk)]))
+out_stream["Data Stream"].appendData(''.join([str(c[1]) for c in context.unpack(data_chunk)]))

bt5/erp5_wendelin/PathTemplateItem/portal_callables/DataIngestionLine_writeFluentdIngestionToDataStream.xml

@@ -77,7 +77,7 @@
         </item>
         <item>
             <key> <string>_params</string> </key>
-            <value> <string>data_chunk=None, data_stream=None</string> </value>
+            <value> <string>data_chunk, out_stream={}</string> </value>
         </item>
         <item>
             <key> <string>comment</string> </key>