Renamed MetaDataSvc to Gaudi::MetaDataSvc
MetaDataSvc is moved into the Gaudi namespace to avoid conflicts with the existing MetaDataSvc in ATLAS.
This also includes a minor fix to MetaDataSvc.
Fixes GAUDI-1199
MetaDataSvc is moved into the Gaudi namespace to avoid conflicts with the existing MetaDataSvc in ATLAS.
This also includes a minor fix to MetaDataSvc.
Fixes GAUDI-1199