Moved a test case that caused deprecation warnings.

`cache.tests.TestEtagWithAdmin` loaded views from the `admin_views` test
package. This is problematic because when the `cache` test package is
run in isolation, `admin_views` isn't in INSTALLED_APPS, and therefore
loading its models isn't allowed since the app loading refactor.

tests/admin_views/tests.py

@@ -5180,3 +5180,19 @@ class AdminGenericRelationTests(TestCase):
             validator.validate_list_filter(GenericFKAdmin, Plot)
         except ImproperlyConfigured:
             self.fail("Couldn't validate a GenericRelation -> FK path in ModelAdmin.list_filter")
+
+
+@override_settings(ROOT_URLCONF="admin_views.urls")
+class TestEtagWithAdminView(TestCase):
+    # See https://code.djangoproject.com/ticket/16003
+
+    def test_admin(self):
+        with self.settings(USE_ETAGS=False):
+            response = self.client.get('/test_admin/admin/')
+            self.assertEqual(response.status_code, 302)
+            self.assertFalse(response.has_header('ETag'))
+
+        with self.settings(USE_ETAGS=True):
+            response = self.client.get('/test_admin/admin/')
+            self.assertEqual(response.status_code, 302)
+            self.assertTrue(response.has_header('ETag'))

tests/cache/tests.py

@@ -2058,22 +2058,6 @@ class TestWithTemplateResponse(TestCase):
         self.assertTrue(response.has_header('ETag'))
 
 
-@override_settings(ROOT_URLCONF="admin_views.urls")
-class TestEtagWithAdmin(TestCase):
-    # See https://code.djangoproject.com/ticket/16003
-
-    def test_admin(self):
-        with self.settings(USE_ETAGS=False):
-            response = self.client.get('/test_admin/admin/')
-            self.assertEqual(response.status_code, 302)
-            self.assertFalse(response.has_header('ETag'))
-
-        with self.settings(USE_ETAGS=True):
-            response = self.client.get('/test_admin/admin/')
-            self.assertEqual(response.status_code, 302)
-            self.assertTrue(response.has_header('ETag'))
-
-
 class TestMakeTemplateFragmentKey(TestCase):
     def test_without_vary_on(self):
         key = make_template_fragment_key('a.fragment')