Add test for animation

Tests/short_tests.json

@@ -1105,5 +1105,14 @@
 	    "$src_dir/Analysis/plot_eddy_contours.py",
 	    "$src_dir/Tests/Input/Region_6_SHP_triplet", "--save=png"
 	]
+    },
+    {
+	"title": "Animation",
+	"command":
+	[
+	    "$src_dir/Analysis/plot_eddy_contours.py",
+	    "--anim", "20454", "20455",
+	    "--light", "$src_dir/Tests/Input/Region_6_SHP_triplet"
+	]
     }
 ]