Pull request #96: Bugfix/VECTO-1465 pev pccstate oscillates between interrupt and usecase1

Merge in VECTO/vecto-dev from VECTO/mk_vecto-dev:bugfix/VECTO-1465-pev-pccstate-oscillates-between-interrupt-and-usecase1 to develop

* commit '5fda37eb':
  removed invalid empty testcase calls
  DefaultDriverStrategy reverted some checks for null
  reverted some of the changes for pulling (HandleHaltAction, IsLockedGear)
  corrected HEV tests again
  updated PCC testcases again to work again after bug correction
  corrected bug with braking for one single timestep at the end of PCC-UseCase1 when target speed was reached.
  updated test cases to work with new interface (PCCState on Databus)
  better debug-readability for PerSecond class
  corrected bug in em-drag losses calculation: used wrong sign
  reformated code for UpdatePCCState
  SI better debug display message
  HybridStrategy HaltAction: removed check for EngineStopStart ... not valid for hybrid vehicles.
  Added PCCState in DriverInfo, used it in HybridStrategy to do coasting with both engines switched off (only for coasting in PCC UseCase 1 and 2)
  refactored commonly used variables out of long statements
  code formatting and minor refactoring