Nightly art jetrec

• The changes to these files make ART nightly comparisons to the previous nightly instead of a static reference file. This is the desired comparison for Jet/EtMiss.
• Grid tests have ran well, and the outputs look fine.
  • https://bigpanda.cern.ch/task/24611172/
  • https://bigpanda.cern.ch/task/24611566/
  • https://bigpanda.cern.ch/task/24611571/
• tagging @tcuhadar