After an instance is successfuly requested to SlapOS Master there's no need to

query SlapOs Master again and again if it created accordingly the Computer
Partitions as anyway scalability tests will start only when instance's state is
reported to SlapOs Master as ready. Thus in this case this check (and requests
to SlapOs Master) is not providing any valuable information at all.

erp5/util/testnode/ScalabilityTestRunner.py

@@ -463,7 +463,6 @@ Require valid-user
                              self.frontend_instance_guid,
                              purge_previous_instance = not self.use_existing_setup)
         logger.debug("Scalability instance requested.")
-        self._waitInstanceCreation(self.instance_title)
       except Exception as e:
         logger.error("Error creating instance: " + str(e))
         return {'status_code' : 1}