To resolve the "test_GetKpiDescriptor" test fail issue.

- Test was failing due to a "NotFoundException."
- Replaced with None and made approriate changes in files (Kpi_DB.py and KpiManagerServiceImpl) to handle the None value.

src/kpi_manager/database/Kpi_DB.py

@@ -85,8 +85,9 @@ class KpiDB:
                 # LOGGER.debug(f"{model.__name__} ID found: {str(entity)}")
                 return entity
             else:
-                LOGGER.debug(f"{model.__name__} ID not found: {str(id_to_search)}")
-                raise NotFoundException (model.__name__, id_to_search, extra_details=["Row not found with ID"] )
+                LOGGER.debug(f"{model.__name__} ID not found, No matching row: {str(id_to_search)}")
+                print("{:} ID not found, No matching row: {:}".format(model.__name__, id_to_search))
+                return None
         except Exception as e:
             session.rollback()
             LOGGER.debug(f"Failed to retrieve {model.__name__} ID. {str(e)}")

src/kpi_manager/service/KpiManagerServiceServicerImpl.py

@@ -52,8 +52,13 @@ class KpiManagerServiceServicerImpl(KpiManagerServiceServicer):
         try: 
             kpi_id_to_search = request.kpi_id.uuid
             row = self.kpi_db_obj.search_db_row_by_id(KpiModel, 'kpi_id', kpi_id_to_search)
-            response = KpiModel.convert_row_to_KpiDescriptor(row)
-            return response
+            if row is None:
+                print ('No matching row found for kpi id: {:}'.format(kpi_id_to_search))
+                LOGGER.info('No matching row found kpi id: {:}'.format(kpi_id_to_search))
+                return Empty()
+            else:
+                response = KpiModel.convert_row_to_KpiDescriptor(row)
+                return response
         except Exception as e:
             print ('Unable to search kpi id. {:}'.format(e))
             LOGGER.info('Unable to search kpi id. {:}'.format(e))