scalability_test: converting metrics to json

scalability_test/__init__.py

 import os.path
+import json
 
 class WendelinERP5_scalability():
 
@@ -32,14 +33,15 @@ class WendelinERP5_scalability():
                                     instance_information_dict['zope-address'])
     return metrics_url + "/ERP5Site_getScalabilityTestMetric"
 
-  def getScalabilityTestOutput(self, metric_list):
+  def getScalabilityTestOutput(metric_list):
     if not metric_list: return None
-    output_dict = metric_list[0]
-    for metric_dict in metric_list:
-      if metric_dict["person_per_hour"] > output_dict["person_per_hour"]:
-        output_dict = metric_dict
+    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
     return "Person: %s doc/hour; SaleOrder: %s doc/hour;" % (
-            str(output_dict["person_per_hour"]), str(output_dict["sale_order_per_hour"]))
+            str(output_json["person_per_hour"]), str(output_json["sale_order_per_hour"]))
 
   def getBootstrapScalabilityTestUrl(self, instance_information_dict, count=0, **kw):
     bootstrap_url = "http://%s:%s@%s/erp5" % (instance_information_dict['user'],