Pull request #3: Bugfix/VECTO-1490 exceeded max iterations operating point could not be found

Merge in VECTO/mk_vecto-dev from bugfix/VECTO-1490-exceeded-max-iterations-operating-point-could-not-be-found to develop

* commit 'ae8564b8':
  use engineOn status as before, only override in case of P1 and braking
  corrected two missing errors (due to sync)
  Hybrid P1: added check in search for BrakeAction if Combustion Engine was off
  Set CombustionEngineOn to True on Braking in HybridStrategy and used this in StartStopCombustionEngine
  Changed Search Algorithm, that it automatically reverses search direction (without throwing exception)
  added TankSystem in DummyVehicle for validation when a engine file is saved.
  Changed all string.Join by the new Extension Method Join()
  refactored and checked many Log-Messages with "Header Line is not valid"
  refactored Extension Method JoinString to Join
  corrected parameters for Log Message (Transmission Loss Map is not valid, VECTO-1481)
  Added new extension method for joining an Enumerable<T> with string.Join