Added SBN (shared) GENIE configuration for BNB and NuMI#492

ibsafa merged 4 commits intoSBNSoftware:developSBNSoftware/sbncode:developfrom

PetrilloAtWork:feature/gp_sharedBNBPetrilloAtWork/sbncode:feature/gp_sharedBNBCopy head branch name to clipboard