erp5_mrp: Production Packing list allow start action from LPMI

bt5/erp5_mrp/WorkflowTemplateItem/portal_workflow/production_packing_list_workflow/state_ready.xml

@@ -19,6 +19,7 @@
                 <string>destination/portal_workflow/production_packing_list_workflow/transition_cancel</string>
                 <string>destination/portal_workflow/production_packing_list_workflow/transition_cancel_action</string>
                 <string>destination/portal_workflow/production_packing_list_workflow/transition_start</string>
+                <string>destination/portal_workflow/production_packing_list_workflow/transition_start_action</string>
               </tuple>
             </value>
         </item>

bt5/erp5_mrp/WorkflowTemplateItem/portal_workflow/production_packing_list_workflow/transition_start_action.xml

@@ -30,6 +30,10 @@
               <none/>
             </value>
         </item>
+        <item>
+            <key> <string>guard_expression</string> </key>
+            <value> <string>python: "lpmi" in here.getSpecialise(portal_type="Business Process")</string> </value>
+        </item>
         <item>
             <key> <string>guard_group</string> </key>
             <value>