Updates required for latest version of ntuples.

- Updated to newest PAT recipe.
- Updated global tags.
- Removed Calo Jets because we don't use them anyway and we used to use L1Offset corrections for them which are no longer included in the latest global tags.
- Added new MCSampleTag called Summer11Leg. At present if a dataset has this MCSampleTag, it always passes the trigger selection because our triggers are not present in the Summer11Leg datasets, so otherwise no events would pass. This needs to be updated once we have 7TeV trigger efficiencies.
- Updated/added MET corrections for 8TeV/7TeV.