erp5_upgrader: Do not rely on getMessageList returning messages in executability order

The order in which messages are returned by getMessageList is undefined,
and manageInvoke refuses to execute messages which are blocked by their
dependencies. Notify depends on Alarm_runUpgrader, so it must be explicitly
ran second.
Also, avoid listing activities twice.

bt5/erp5_upgrader/TestTemplateItem/portal_components/test.erp5.testUpgrader.py

@@ -344,12 +344,19 @@ class TestUpgrader(ERP5TypeTestCase):
 
   def stepCheckNoActivitiesCreated(self, sequence=None):
     portal_activities = self.getActivityTool()
+    message_list = portal_activities.getMessageList()
     self.assertItemsEqual(['Alarm_runUpgrader', 'notify'],
-      [x.method_id for x in portal_activities.getMessageList()])
+      [x.method_id for x in message_list])
     getTitleList = self.getTemplateTool().getInstalledBusinessTemplateTitleList
     self.assertNotIn('erp5_web', getTitleList())
-    for message in portal_activities.getMessageList():
-      portal_activities.manageInvoke(message.object_path, message.method_id)
+    # "notify" must not be executed first as it has a dependency on
+    # Alarm_runUpgrader, so cast into a dict to control execution order.
+    message_dict = {x.method_id: x for x in message_list}
+    for method_id in ['Alarm_runUpgrader', 'notify']:
+      portal_activities.manageInvoke(
+        message_dict[method_id].object_path,
+        method_id,
+      )
     self.assertIn('erp5_web', getTitleList())
     self.commit()
     self.assertEqual({'immediateReindexObject', 'unindexObject'},