Introduced data value object

Created by: stefanoborini

Replaced previous system of Result and Parameter objects for MCO, DataSource and KPICalculator with a set of DataValue objects that contain all the relevant information for a specific entity created by the MCO/DS/KPI

force_bdss/core_plugins/dummy/csv_extractor/tests/test_csv_extractor_data_source.py

 import unittest
 
+from force_bdss.core.data_value import DataValue
 from force_bdss.core_plugins.dummy.csv_extractor.csv_extractor_data_source \
     import CSVExtractorDataSource
 from force_bdss.core_plugins.dummy.csv_extractor.csv_extractor_model import \
     CSVExtractorModel
 from force_bdss.data_sources.base_data_source_bundle import \
     BaseDataSourceBundle
-from force_bdss.data_sources.data_source_result import DataSourceResult
 from force_bdss.tests import fixtures
 
 try:
@@ -27,7 +27,11 @@ class TestCSVExtractorDataSource(unittest.TestCase):
         ds = CSVExtractorDataSource(self.bundle)
         model = CSVExtractorModel(self.bundle)
         model.filename = fixtures.get("foo.csv")
-        mock_params = mock.Mock()
-        mock_params.values = [1.0]
+        model.row = 3
+        model.column = 5
+        mock_params = []
         result = ds.run(model, mock_params)
-        self.assertIsInstance(result, DataSourceResult)
+        self.assertIsInstance(result, list)
+        self.assertEqual(len(result), 1)
+        self.assertIsInstance(result[0], DataValue)
+        self.assertEqual(result[0].value, 42)