Symlink `config_nml.txt` instead of creating it

Inst_eddies/Tests/short_tests.json

@@ -59,12 +59,9 @@
     "Get_1_outerm_noise_2_8": {
 	"description": "Same as test Get_1_outerm except that we have changed outside points: we have removed cyclone 4 in test Extraction_eddies_region_1_noise. We just want to see the target extremum grow its outermost contour.",
 	"input": "&main_nml date = 20454/\n",
-	"create_file": [
-            "config_nml.txt",
-            "&config_nml /\n"
-	],
 	"symlink": [
-            "$src_dir/Inst_eddies/Tests/Input/Region_1/outside_points.csv"
+            "$src_dir/Inst_eddies/Tests/Input/Region_1/outside_points.csv",
+	    "$tests_old_dir/Extraction_eddies_region_1_noise/config_nml.txt"
 	],
 	"commands": [
 	    "mkdir -p SHPC/Slice_0/Cyclones",