CMSSW_11_1_2_patch1

Changes since CMSSW_11_1_2:

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1. 30757 from @felicepantaleo: [HGCal] Shrinking Layer Clustering internal data structures - backport to 11_1_X reconstruction upgrade created: 2020-07-16 16:16:58 merged: 2020-07-20 15:20:26

CMSDIST Changes between Tags REL/CMSSW_11_1_2/slc7_amd64_gcc820 and REL/CMSSW_11_1_2_patch1/slc7_amd64_gcc820:

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