scalability_test: adding createSaleOrder testsuite and metrics

scalability_test/__init__.py

 import os.path
 import json
 
+PERSON_KEY = "person_per_hour"
+ORDER_KEY = "sale_order_per_hour"
+
 class ERP5_scalability():
 
   def getTestList(self):
-    return ['createPerson']
+    return ['createPerson', 'createSaleOrder']
 
   def getTestPath(self):
     return 'example/'
@@ -33,14 +36,20 @@ class ERP5_scalability():
     return metrics_url + "/ERP5Site_getScalabilityTestMetric"
 
   def getScalabilityTestOutput(self, metric_list):
+    """
+    From the list of metrics taken during a test run, select the best metric
+    for the test output by a specific criteria
+    """
     if not metric_list: return None
     output_json = json.loads(metric_list[0])
     for metric in metric_list:
       metric_json = json.loads(metric)
-      if metric_json["person_per_hour"] > output_json["person_per_hour"]:
-        output_json = metric_json
+      if metric_json[PERSON_KEY] > output_json[PERSON_KEY]:
+        output_json[PERSON_KEY] = metric_json[PERSON_KEY]
+      if metric_json[ORDER_KEY] > output_json[ORDER_KEY]:
+        output_json[ORDER_KEY] = metric_json[ORDER_KEY]
     return "Person: %s doc/hour; SaleOrder: %s doc/hour;" % (
-            str(output_json["person_per_hour"]), str(output_json["sale_order_per_hour"]))
+            str(output_json[PERSON_KEY]), str(output_json[ORDER_KEY]))
 
   def getBootstrapScalabilityTestUrl(self, instance_information_dict, count=0, **kw):
     bootstrap_url = "http://%s:%s@%s/erp5" % (instance_information_dict['user'],