HLT menu with new HLT JECs and autoCond update

This PR contains new HLT menus (pp, PbPb, pPb - the latter two as usual in 72X
just simplistic placeholders), all using the new JECs at HLT.

The loading of these new JECs is done via the Configuration/AlCa autoCond
mechanism, modifying the corresponding base GT keys by appending the new
records, as discussed here: 
```
https://hypernews.cern.ch/HyperNews/CMS/get/swDevelopment/3019/3.html
```

The two autoCond files (for CondDB V1 and V2) have also be updated to:
a) remove obsolete HLT payload definitions, and 
b) move the old-style labels (startup,com10, etc) to the end of the file and
define them in terms of the new-style labels (such as run1_data or run2_mc). 
The old-style labels can't yet be removed as some of them are still used in
RelVal tests as well as HLT/TSG tests (as well as widely elsewhere in CMSSW).