add the L1 2015 v2 menu, without changing the default

I also tripped over the ordering issue when working on L1REPACK :)
I was going for:
```
        import FWCore.ParameterSet.DictTypes as DictTypes
        custMap=DictTypes.SortedKeysDict()
```
Is 
```
custMap=collections.OrderedDict()
```
 better?