base: chain Currency Exchange Cell with reindex_interaction_workflow

When a currency exchange line is (in)validated, we need to reindex the currency exchange
cells that acquire validation state from the currency exchange line.

bt5/erp5_base/PortalTypeWorkflowChainTemplateItem/workflow_chain_type.xml

@@ -33,7 +33,7 @@
  </chain>
  <chain>
   <type>Currency Exchange Line</type>
-  <workflow>currency_exchange_line_interaction_workflow, edit_workflow, validation_workflow</workflow>
+  <workflow>currency_exchange_line_interaction_workflow, edit_workflow, reindex_object_interaction_workflow, validation_workflow</workflow>
  </chain>
  <chain>
   <type>Email</type>

bt5/erp5_base/bt/template_portal_type_workflow_chain_list

@@ -11,6 +11,7 @@ Credit Card | edit_workflow
 Credit Card | validation_workflow
 Currency Exchange Line | currency_exchange_line_interaction_workflow
 Currency Exchange Line | edit_workflow
+Currency Exchange Line | reindex_object_interaction_workflow
 Currency Exchange Line | validation_workflow
 Currency | edit_workflow
 Currency | validation_workflow