bug in create Twinbuilder setup

Right now we are returning a SetupCircuit but this fails in the update() because the solution types "TR", "AC" and "DC" are not supported. Available solution types are "Nexxim.." etc. Problem is here in solve_setup.py > SetupCircuit > update: self._setup(soltype, arg, False)
@Samuelopez-ansys @eblanco-ansys 