CMSSW_7_1_45_patch3

Changes since CMSSW_7_1_45_patch2:

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1. 28610 from @makortel: Add enforceGUIDInFileName option to PoolSource (7_1_X) core created: 2019-12-11 18:38:12 merged: 2019-12-17 17:12:10

CMSDIST Changes between Tags REL/CMSSW_7_1_45_patch2/slc6_amd64_gcc481 and REL/CMSSW_7_1_45_patch3/slc6_amd64_gcc481:

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