MadGraph Sim10 support

Compared to Pythia8 step:

• replace $LBPYTHIA8ROOT/options/Pythia8.py with $LBMADGRAPHROOT/options/MadgraphPythia8.py

• add Gen/MadgraphData.v20903r7p1 to data-packages

• add check that $MADGRAPHDATAROOT/gridpacks/{platform}/{eventType}_{beam1energyGeV}_{beam2energyGeV}.tgz exists

• add simulation condition(s) to bookkeeping