Draft: unittest test do NOT merge
Removed the use of the IOVSvc callback as it is not thread-safe. Now relying solely on incidents (begin run/file) Also removed DataHandles use to not trigger gccchecker thread safety errors (see ATEAM-855)
Removed the use of the IOVSvc callback as it is not thread-safe. Now relying solely on incidents (begin run/file) Also removed DataHandles use to not trigger gccchecker thread safety errors (see ATEAM-855)