erp5_pdm&mrp: get int index also from transformation line

bt5/erp5_mrp/PathTemplateItem/portal_deliveries/manufacturing_execution_builder/property_movement_group_on_line.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="Property Movement Group" module="erp5.portal_type"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>categories</string> </key>
+            <value>
+              <tuple>
+                <string>divergence_scope/property</string>
+                <string>collect_order_group/line</string>
+              </tuple>
+            </value>
+        </item>
+        <item>
+            <key> <string>description</string> </key>
+            <value>
+              <none/>
+            </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>property_movement_group_on_line</string> </value>
+        </item>
+        <item>
+            <key> <string>int_index</string> </key>
+            <value> <int>2</int> </value>
+        </item>
+        <item>
+            <key> <string>portal_type</string> </key>
+            <value> <string>Property Movement Group</string> </value>
+        </item>
+        <item>
+            <key> <string>tested_property</string> </key>
+            <value>
+              <tuple>
+                <string>int_index</string>
+              </tuple>
+            </value>
+        </item>
+        <item>
+            <key> <string>title</string> </key>
+            <value> <string>property_movement_group_on_line</string> </value>
+        </item>
+        <item>
+            <key> <string>update_always</string> </key>
+            <value> <int>0</int> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>

bt5/erp5_pdm/DocumentTemplateItem/portal_components/document.erp5.TransformedResource.py

@@ -71,7 +71,7 @@ class TransformedResource(AmountGeneratorLine):
       # we also need to check if 'self' has a quantity.
       # Otherwise, generated amounts could have 0 quantity
       # (overridden by cells that only define variation).
-      result = ['quantity']
+      result = ['quantity', 'int_index']
       # Take into account variation_property_list for each variation
       # for which hasProperty is true...
       # FIXME: Why the resource and not the model line itself ? Or both ??