Add PrChecker Test
This should run once a day and add physics performance numbers for the MiniBrunel tests which already run.
Therefore giving us both physics and computing performance numbers for MiniBrunel
Edit: Sorry forgot the command. Running with lb-run -c x86_64-centos7-gcc62-opt --user-area=/cvmfs/lhcbdev.cern.ch/nightlies/lhcb-future/Today/ Brunel/future gaudirun.py \$PRCONFIGOPTS/Brunel/MiniBrunel/Upgrade_PhysPerf_PrChecker.py
should work.