SUSYObjDef_xAOD::GetFatJets() function doesn't properly handle recording fatjet containers of systematic variations in the
xAOD::TStore. They would all get the same key in the TStore, resulting in the TStore complaining about
Trying to overwrite object with key <the_key>
Trivially fixed by putting the name of the systematic variation into the key, similar to how it is being done in all other SUSYTools Get functions, e.g.