chrono: add timers based on CLOCK_REALTIME_COARSE and CLOCK_MONOTONIC_COARSE
FastTimerService: remove obsolete parameters
Merge pull request #5100 from fwyzard/FastTimerService_remove_obsolete_parameters

FastTimerService: remove obsolete parameters
Merge remote branch 'origin/CMSSW_7_2_X' into CMSSW_7_0_X