Backport from 7_2_X new HF shower library

This PR backports configuration of HF shower libraries for 2012 and 2015 simulation.

It can be tested only if PR 981 for cmsdist is implemented, so corresponding SL files are available in IB. 
As this PR should go in alongside cms-sw/cmsdist#981, here the filename should be instead:
```
'SimG4CMS/Calo/data/HFShowerLibrary_npmt_eta4_16en.root'
```