estimate_landing_field_length regression scripts return NaNs

[jmvegh]

It is probably related to the aerodynamics package SUAVE.Methods.Aerodynamics.Fidelity_Zero.Lift.compute_max_lift_coeff

As it works all right when vehicle.config.maximum_lift_coefficient is specified

[planes]

This has been fixed, had to do with propulsor? Used the wrong correlation.