A new structure AliHLTPHOSValidCellDataStruct.h was added in order to improve

A new structure  AliHLTPHOSValidCellDataStruct.h was added in order to improve
the online processing performance. Instead of looping trough all 35480 channels
the raw anlyzer algorithm only has to loop the data in an array of ValidCellDataStructs.
This, combined with a counter counting the number of channels containing valid
data drastically improves performance because the arrays containing analyzed
data dont have to be resetted. The AliHLTPHOSRawAnalyzer  class
was modified to incorporate this new feature.