Edited unit tests

This test caused a breach in security due to the alert block displaying sensitive data.

core/templates/core/404.jinja

@@ -4,9 +4,6 @@
 
 <div id="page">
 	<h3>{% trans %}404, Not Found{% endtrans %}</h3>
-	<p class="alert alert-red">
-		{{ exception }}
-	</p>
 </div>
 
 {% endblock %}

galaxy/tests.py

@@ -142,8 +142,4 @@ class GalaxyTest(TestCase):
         Galaxy.rule()
         self.client.login(username="root", password="plop")
         response = self.client.get("/galaxy/2/")
-        self.assertContains(
-            response,
-            "Ce citoyen n'a pas encore rejoint la galaxie",
-            status_code=404,
-        )
+        self.assertEquals(response.status_code, 404)