tests/ep/rbcii.mod: use supported mechanism for user-provided steady state file

Incidentally, this should fix random crashes under Octave (where the manually
copied steady state file was not correctly detected by the interpreter).

tests/.gitignore

@@ -48,7 +48,7 @@ wsOct
 !/ep/ar_steadystate.m
 !/ep/exact_solution.m
 !/ep/mean_preserving_spread.m
-!/ep/rbcii_steady_state.m
+!/ep/rbcii_steadystate.m
 !/estimation/fsdat_simul.m
 !/estimation/method_of_moments/AnScho/AnScho_MoM_data_2.mat
 !/estimation/method_of_moments/RBC/RBC_MoM_steady_helper.m

tests/ep/rbcii.mod

@@ -54,10 +54,6 @@ model(use_dll);
 
 end;
 
-// Write analytical steady state file (without globals)
-options_.steadystate_flag = 2;
-copyfile('rbcii_steady_state.m','+rbcii/steadystate.m');
-
 @#if extended_path_version
 
     shocks;

tests/ep/rbcii_steadystate.m

@@ -1,5 +1,7 @@
-function [ys_, params, info] = rbcii_steadystate2(ys_, exo_, params)
+function [ys_, params, info] = rbcii_steadystate(ys_, exo_, M_, options_)
      
+    params = M_.params;
+
     % Flag initialization (equal to zero if the deterministic steady state exists) 
     info = 0;
     
@@ -85,4 +87,4 @@ function [labour,info] = l_solver(labour,alpha,psi,theta,effstar,kstar,maxiter)
         condition = abs(r)>1e-9;
         iteration = iteration + 1; 
     end
-end
+end