cms-sw/cmssw CMSSW_7_6_3_patch1 on GitHub

#12940 from @lgray: Bugfix to merging loop in PFEGAlgo (76X) reconstruction
#12930 from @bachtis: Fix issue with weird linking case crashing reprocessing reconstruction
#12921 from @perrotta: New HCalTower cleaner including rechits - 76X hlt
#12911 from @cbernet: Heppy 7 6 3 analysis
#12889 from @cms-btv-pog: Cloning of input PackedCandidates in PuppiProducer when using existing Puppi weights (76X) analysis reconstruction
#12830 from @diguida: New GT for all scenarios, including Heavy Ion Run2 simulation changes already deployed in 75X and 80X. alca
#12813 from @ebrondol: Adapting MuIsoDepositProducer to 76X reconstruction
#12785 from @ghellwig: Remove obsolete cms* scripts 76X( Backport of #12783) alca
#12778 from @ghellwig: Alignment filters 76X (Backport of #12776) alca
#12775 from @ggovi: Fix to support the old synchronization types db
#12773 from @blinkseb: Fix infinite recursion in JER code analysis db
#12769 from @Martin-Grunewald: 76X_HLTrigReport_MTfix hlt
#12742 from @lgray: EGM ID Update 76X reconstruction
#12524 from @hroskes: Backport of #12523: Small bugfixes in alignment workflows alca
#12496 from @schoef: Consumes migration for PFSimParticleProducer in RecoParticleFlow/PFSimProducer reconstruction
#12180 from @richard-cms: Level-1 Trigger changes for HI Firmware (76X backport of #12176) alca db l1
#9750 from @mschrode: Set hierarchy constraints as default in Millepede alca