Develop an example to run FunTuple with xgen files

It was suggested in Mattermost here to develop an example to run FunTuple with xgen files. The FunTuple configuration will be the same but the input will be changed. @dfazzini we should be able to read xgen with new DV but an example is missing.

FYI: @erodrigu , @pkoppenb , @mferrill and @powen.