CMSSW_9_1_2

Changes since CMSSW_9_1_1_patch3:

compare to previous

1. 19998 from @kpedro88: Avoid NaNs in SimClustering [91X] reconstruction simulation upgrade created: 2017-08-01 15:16:44 merged: 2017-08-04 14:20:09

CMSDIST Changes between Tags REL/CMSSW_9_1_1_patch3/slc6_amd64_gcc530 and REL/CMSSW_9_1_2/slc6_amd64_gcc530:

compare to previous

1. 3082 from @cms-sw: Use new build rule tag V05-05-24 created: 2017-06-01 14:02:25 merged: 2017-06-01 14:02:57

2. 3036 from @cms-sw: Updating Fireworks-Geometry to new tag V07-05-02 created: 2017-05-15 07:26:03 merged: 2017-05-26 09:52:44