Adding NNJvtPass decoration to PHYSLITE

Following discussions in AMG, the modern recommendations will use NNJvtPass. My understanding of the discussion thread was that the other variables should be dropped, since they won't be needed for analyses running on PHYSLITE anyway.

Since we want to keep PHYSLITE small, and since we have other derivations with which extensive debugging and cross-checking can be done, I'm dropping the "old" Jvt decorations here – comments welcome as always.

For comment, adding @hrussell , @vimartin , @wbalunas , @calpigia , @miholzbo