added tests for RetarderType wrt to powertrain architecture,

VECTO/Input Files/Vehicle.vb

...dBus/Generic/DeclarationDataAdapterGenericCompletedBus.cs

...ectAdapter/HeavyLorry/DeclarationDataAdapterHeavyLorry.cs

...tData/Reader/DataObjectAdapter/IDeclarationDataAdapter.cs

...ectAdapter/PrimaryBus/DeclarationDataAdapterPrimaryBus.cs

...r/SimulationComponents/Interfaces/IRetarderDataAdapter.cs

...ObjectAdapter/SimulationComponents/RetarderDataAdapter.cs

...bjectAdapter/SingleBus/DeclarationDataAdapterSingleBus.cs

...nDataFactory/DeclarationModeCompletedBusRunDataFactory.cs

...RunDataFactory/DeclarationModeHeavyLorryRunDataFactory.cs

...Factory/DeclarationModeHeavyLorryRunDataFactory_Hybrid.cs

...RunDataFactory/DeclarationModePrimaryBusRunDataFactory.cs

.../SingleBus/DeclarationModeSingleBusVectoRunDataFactory.cs

...l/DeclarationVTPModeVectoRunDataFactoryHeavyBusPrimary.cs

...ader/Impl/DeclarationVTPModeVectoRunDataFactoryLorries.cs

...Models/Declaration/DataAdapter/RetarderDataAdapterTest.cs