Fixed API of the module

force_bdss/core_plugins/dummy_kpi/kpi_adder/kpi_adder_bundle.py

@@ -17,5 +17,5 @@ class KPIAdderBundle(HasStrictTraits):
 
         return KPIAdderModel(self, **model_data)
 
-    def create_data_source(self, application, model):
+    def create_kpi_calculator(self, application, model):
         return KPIAdderCalculator(self, application, model)