Import patch r48226: forgot to Reset() the timer in TShutdownTimer::Notify; remove calls to Info in TStopTimer::Notify and TDispatchTimer::Notify


git-svn-id: https://root.cern.ch/svn/root/branches/v5-34-00-patches@48227 27541ba8-7e3a-0410-8455-c3a389f83636