scram-project-build: sync changes from 72x/71X in to 70X
Merge pull request #973 from smuzaffar/IB/CMSSW_7_0_X/stable

scram-project-build: sync changes from 72x/71X in to 70X
Merge remote branch 'origin/IB/CMSSW_7_0_X/stable' into IB/CMSSW_7_0_X/stable
Merge remote branch 'origin/IB/CMSSW_7_1_X/stable' into IB/CMSSW_7_0_X/stable
Merge remote branch 'origin/IB/CMSSW_7_2_X/stable' into IB/CMSSW_7_0_X/stable