HLT TRD update by Konstantin

HLT TRD update by Konstantin
* Option to pass clusters and tracks between components in TClonesArray removed.
  We must use only low-level interface now.
* Restructure of the code
* AliTRDClusterizerHLT.[h,cxx] renamed to AliHLTTRDClusterizer.[h,cxx]
* AliHLTTRDUtils.[h,cxx] created, that contains class with commonly used functions in HLTTRD
* AliHLTTRDTrackerComponent.[h,cxx] removed, since we are using only TrackerV1