Removed use of Utilities/Timing

The code under Utilitites/Timing was not thread safe and was only
used in a handful of places.
No longer link to removed Utilities/Timing package
Fix two compilation errors in ROOT6 IB
Merge pull request #4586 from wmtan/FixTwoCompErrorsInROOT6IB

Fix two compilation errors in ROOT6 IB.
Merge pull request #4492 from Dr15Jones/removeUtilitiesTiming

Removed use of `Utilities/Timing`.
Merge remote branch 'origin/CMSSW_7_2_X' into CMSSW_7_0_X