Ramsey steady state computation could fail if expectation or diff operator is present

If auxiliary variables were created *before* the Lagrange multipliers (e.g. aux
vars related to the expectation or diff operators), then the vector of
residuals of the reduced Ramsey steady state problem (with respect to original
variables, as computed by the dyn_ramsey_static_1 subfunction) was incorrect.

(cherry picked from commit 674ebce8)