Example of usage:
text2workspace.py -P python.FCCModels:fccHiggs test/simple-fcc.txt
combine -M MultiDimFit -P kappaZ -P width --floatOtherPOIs=0 test/simple-fcc.root
if model is moved in scram structures:
text2workspace.py -P HiggsAnalysis.CombinedLimit.FCCModels:fccHiggs test/simple-fcc.txt