CMSSW_9_3_13

Changes since CMSSW_9_3_12_patch2:

compare to previous

1. 24809 from @alberto-sanchez: updated relval gridpacks for gcc630 generators created: 2018-10-05 01:51:48 merged: 2018-10-15 07:49:09

2. 24808 from @siddhesh86: Added mixing scenario for PU250 PU300 in Configuration/StandardSequences/python/Mixing.py operations created: 2018-10-04 20:29:48 merged: 2018-10-12 11:16:48

CMSDIST Changes between Tags REL/CMSSW_9_3_12_patch2/slc6_amd64_gcc630 and REL/CMSSW_9_3_13/slc6_amd64_gcc630:

compare to previous

1. 4385 from @cms-sw: [9.3.X] updated Sherpa 2.2.5 and OpenLoops 2.0.b created: 2018-09-27 12:06:12 merged: 2018-10-10 10:40:20