DIPZ menu chains: Adding new multijet chains to validate maxmult tool
In this MR, two new chains are added to the previous DIPZ multijet chains to validate the effect of the "MAXMULT" filter on the DIPZ disciminant variable output inn the events.
Passed the '''runTrigART.py -m -j4" tests and updated the ref files accordingly.
Tagging @miochoa @kleney @dguest @cpollard @lbeemste @lshi @khoo @jlsmith