LCIOExceptionHandler: Switched back to thread safe implementation. Removed usage of deprecated function set_unexpected and set_terminate
LCIOExceptionHandler: Switched back to thread safe implementation. Removed usage of deprecated function set_unexpected and set_terminate

iLCSoft/LCIO,petricm/LCIO,petricm/LCIO,iLCSoft/LCIO,petricm/LCIO,iLCSoft/LCIO,petricm/LCIO,petricm/LCIO,iLCSoft/LCIO,iLCSoft/LCIO,petricm/LCIO,iLCSoft/LCIO