ProcessingNodeTestCase: Disable alarms for timerserver_thread loop

product/ERP5Type/tests/ProcessingNodeTestCase.py

 # -*- coding: utf-8 -*-
-import errno, logging, os, socket, time
+import errno, logging, mock, os, socket, time
 import itertools
 from threading import Thread
 from UserDict import IterableUserDict
@@ -396,6 +396,14 @@ class ProcessingNodeTestCase(ZopeTestCase.TestCase):
     """
     import Products.TimerService
 
+    # AlarmTool uses alarmNode='' as a way to bootstrap an alarm node, but
+    # during these tests we don't want the first node to start executing
+    # alarms directly, because this usually cause conflicts when other
+    # nodes register.
+    with mock.patch(
+      'Products.ERP5.Tool.AlarmTool.AlarmTool.getAlarmNode',
+      return_value='bootstrap_disabled_in_test'):
+
       timerserver_thread = None
       try:
         while not Lifetime._shutdown_phase: