Moved CbmStsDigitizeQa, CbmStsDigitizeQaReport and CbmStsFindTracksQa to qa...
Moved CbmStsDigitizeQa, CbmStsDigitizeQaReport and CbmStsFindTracksQa to qa subfolders. Updated CMakeLists.txt accordingly.
Comment: May require deletion of "CbmStsSimDict" and "CbmRecoStsDict" library files in build directory to trigger recompilation.
Suggested reviewer: @f.uhlig