Draft: Add PRtest for Madgraph

assigned to @gcorti and @philten

requested review from @gcorti and @philten

unassigned @gcorti and @philten

cc: @fredi

This will run the test and produced standard histograms for generic distributions, for this type of generators, should be also have some additional dedicated distributions to check in a different tab of the dashboard?

cc: @dpopov

added 3 commits

• 75bef84d...9c799ad3 - 2 commits from branch master
• 2c5fa983 - Add PRtest for Madgraph

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assigned to @rpozzi

resolved all threads

added 15 commits

• 2c5fa983...309c1e58 - 14 commits from branch master
• 42258697 - Add PRtest for Madgraph

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added Simulation label