CMSSW_10_6_4_patch2

Changes since CMSSW_10_6_4_patch1:

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1. 28013 from @cms-tsg-storm: Fixup of L1REPACK for tasks hlt created: 2019-09-17 07:21:56 merged: 2019-10-14 07:28:10

2. 28007 from @makortel: Fix ExpandVisitor.result() to work also with an empty result (10_6_X) core created: 2019-09-16 16:21:43 merged: 2019-10-14 07:26:49

CMSDIST Changes between Tags REL/CMSSW_10_6_4_patch1/slc7_amd64_gcc700 and REL/CMSSW_10_6_4_patch2/slc7_amd64_gcc700:

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