src/GenericMuonSensitiveDetector.cxx, src/TGCSensitiveDetectorCosmics.cxx,...

src/GenericMuonSensitiveDetector.cxx, src/TGCSensitiveDetectorCosmics.cxx, src/sTGCSensitiveDetector.cxx, src/MDTSensitiveDetectorCosmics.cxx, src/RPCSensitiveDetectorCosmics.cxx, src/CSCSensitiveDetectorCosmics.cxx - use m_hitCollHelp.RetrieveNonconstCollection to obtain the SimHit Collection in the Initialize method and use m_hitCollHelp.ExportCollection. This matches what is done in the other sensitive detector classes in this package. This should fix the warnings seen in ISF_G4 cosmics simulation jobs. ATLASSIM-493. Tagged MuonG4SD-00-02-02 (MuonG4SD-00-02-02)