Add test for `anim_eddy_contours.py`

Since it is now possible to have one or more SHPC as arguments.

Inst_eddies/Analysis/tests.json

@@ -90,5 +90,15 @@
 	    "$src_dir/Inst_eddies/Tests/Input/h_region_4.nc"
 	],
 	"input": "17\n-37\n0.2\n"
+    },
+    {
+	"title": "Animation_2_SHPC",
+	"description": "With two input SHPC and no option light.",
+	"command":
+	[
+	    "$src_dir/Inst_eddies/Analysis/anim_eddy_contours.py",
+	    "$tests_old_dir/Inst_eddies_loop/SHPC_cyclo_all_dates",
+	    "$tests_old_dir/Inst_eddies_loop/SHPC_anti_all_dates"
+	]
     }
 ]