New Using Notify static page

Adds the new Using Notify view

Adds route to Using Notify page.

Add redirects for old pages

Removes the delivery and failure page as it's now in the Using Notify one

Removes the trial mode page due to Using Notify page

tests/app/main/views/test_index.py

@@ -17,7 +17,7 @@ def test_logged_in_user_redirects_to_choose_service(
 
 
 @pytest.mark.parametrize('view', [
-    'cookies', 'trial_mode', 'pricing', 'terms', 'delivery_and_failure', 'integration_testing', 'roadmap', 'features'
+    'cookies', 'using_notify', 'pricing', 'terms', 'integration_testing', 'roadmap', 'features'
 ])
 def test_static_pages(
     client,
@@ -25,3 +25,21 @@ def test_static_pages(
 ):
     response = client.get(url_for('main.{}'.format(view)))
     assert response.status_code == 200
+
+
+@pytest.mark.parametrize('view, expected_anchor', [
+    ('delivery_and_failure', 'messagedeliveryandfailure'),
+    ('trial_mode', 'trial-mode'),
+])
+def test_old_static_pages(
+    client,
+    view,
+    expected_anchor,
+):
+    response = client.get(url_for('main.{}'.format(view)))
+    assert response.status_code == 301
+    assert response.location == url_for(
+        'main.using_notify',
+        _anchor=expected_anchor,
+        _external=True
+    )