TGC Cabling Service code improvements
- Cleaning up the TGC Cabling Service not to use TGCCablingServerSvc.
- Instead of abstract base class of ITGCcablingSvc, MuonTGC_CablingSvc is directly managed by ServiceHandle.
- Improved class structure in the TGCCabling package
Ref. ATLASMCP-242
Edited by Junpei Maeda