Reorganising the TPC transformation in HLT:

Reorganising the TPC transformation in HLT:

- Global instance of AliHLTTPCFastTransform removed. Instead, a private static member is put to the transformation component.

- All the calculations, incl. alignment are moved from AliHLTTPCClusterTransformation to AliHLTTPCFastTransform.
Now the AliHLTTPCClusterTransformation class only initialises the HLT environment - data base, geometry, TPCRecoParam

- During off-line reprocessing, the Time Stamp is reset in the first event, when the event time stamp differs significantly from the initialisation time.

- Extra checks and eror messages added.