[TestDistributor] Include computer_guid parameter on startTestSuite

  This parameter has been passed always by the erp5.util implementation. Introduce
  this parameter makes the API compatible for future implementation with support
  to scalability tests even if the current code is not ready yet.

product/ERP5/Document/CloudPerformanceUnitTestDistributor.py

@@ -69,7 +69,7 @@ class CloudPerformanceUnitTestDistributor(ERP5ProjectUnitTestDistributor):
       test_node.setAggregateList(test_suite_list)
 
   security.declarePublic("startTestSuite")
-  def startTestSuite(self,title):
+  def startTestSuite(self,title, computer_guid=None):
     """
     give the list of test suite to start. We will take all test suites
     associated to the testnode. Then we add the test node title to the

product/ERP5/Document/ERP5ProjectUnitTestDistributor.py

@@ -258,7 +258,7 @@ class ERP5ProjectUnitTestDistributor(XMLObject):
     return test_suite_list
 
   security.declarePublic("startTestSuite")
-  def startTestSuite(self,title, batch_mode=0):
+  def startTestSuite(self,title, computer_guid=None, batch_mode=0):
     """
     startTestSuite doc
     """