Merge pull request #5329 from davidlt/from-CMSSW_7_2_X_2014-09-17-0200

FWCore: add support for Address Sanitizer IBs
Merge pull request #5420 from cms-sw/CMSSW_7_2_X

Forward port CMSSW_7_2_X into CMSSW_7_3_X
Merge remote branch 'origin/CMSSW_7_3_X' into CMSSW_7_0_X