Add lhapdf6 tool keeping it inactive
Merge pull request #1062 from mkirsano/lhapdf6_fix_structure_71

Add lhapdf6 tool keeping it inactive
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
Merge remote branch 'origin/IB/CMSSW_7_3_X/stable' into IB/CMSSW_7_0_X/stable