model build/run should have no dependence on IFO or any other arbitrary variable
A common problem is that models configured for one IFO can't be run on another IFO. This is because we have insisted on the IFO and SITE variables being encoded in various places in the model build. This seem superfluous, and causes many headaches. There should be nothing IFO specific about the models, and they should be portable between systems. The build system should eliminate any reference to IFO and SITE.