Merge in VECTO/vecto-dev from VECTO/mk_vecto-dev:feature/VECTO-1540-axlegearinputretarder to develop

* commit '78589981': (93 commits)
  AbstractSimulationDataAdapter.SetCommonRetarderData: moved access to ratio back to the place when we are sure that the retarder exists.
  RetarderTest: Added additional test for creation of different retarder types and powertrainPositions
  AbstractSimulationDataAdapter: Added check for correct retarder positions
  JSONRetarderInputData: Removed check if retarder is allowed. Now it just reads the retarder, if it is defined in the file.
  Removed DummyRetarder
  UserManual: Added Axelgear Input Retarder in description
  JSONInputData: minor formatting
  JsonFileWriter: Reformated file and refactored to use collectioninitializer syntax
  Gearbox.vb: MockEngineeringVehicle: Removed readonly from VehicleType to set it in initializer
  VectoJob.vb: Corrected bug when gearboxInputData is nothing (e.g. E3)
  VectoJobForm: Corrected bug when GearboxInputData is empty (e.g. E3)
  BatteryElectricMotorController: Corrected Bug when GearboxModelData is null (e.g. E3)
  Added E3 and S3 Tests for Retarder
  BatteryElectricTest: Added Retarder to test cases
  Added example retarder in test case
  Formatting
  Code Formatting
  Added retarder test data
  merge again
  Resolve Conflicts while merge
  ...