Trigger related changes :

Trigger related changes :
 - store hit pattern also for "ghost tracks" i.e. trigger tracks which does not match tracker. This is useful to increase statistics for trigger chamber efficiency determination in cosmic runs.
 - Correctly initialize the parameters for trigger chamber efficiency determination in cosmic runs (in AliMUONRecoParam).
Also:
 - Move trigger digits creation from local trigger store in AliMUONDigitMaker (more appropriate than in AliMUONTrackHitPattern).
(Diego Stocco)