Testsuite: rename estimation/univariate/ols/ols.mod

Under Octave, the +ols folder conflicts with the builtin ols() function.

tests/Makefile.am

@@ -533,7 +533,7 @@ OLS_MODFILES = \
 	estimation/univariate/ols/ols_wc_3.mod \
 	estimation/univariate/ols/ols_date_range.mod \
 	estimation/univariate/ols/ols_param_names.mod \
-	estimation/univariate/ols/ols.mod \
+	estimation/univariate/ols/ols_base.mod \
 	ecb/SUR/sur_noniterative.mod \
 	ecb/SUR/sur_params_noniterative.mod \
 	ecb/SUR/panel_var_diff_NB_simulation_test.mod \

tests/estimation/univariate/ols/mc-ols.inc

@@ -49,7 +49,7 @@ verbatim;
             error('There is probably an error in the OLS routine.')
         end
     else
-        if strcmp(M_.fname, 'ols')
+        if strcmp(M_.fname, 'ols_base')
             good = [0.025487074270635
                 -0.126705792250240
                 0.002639663639062