Add contract test for 'v2' email notification

We don't have a way of creating letter notifications just yet, so
this is all we can test.

tests/app/public_contracts/test_GET_notification.py

@@ -16,13 +16,20 @@ def _get_notification(client, notification, url):
     return client.get(url, headers=[auth_header])
 
 
-def test_get_v2_notification(client, sample_notification):
+def test_get_v2_sms_contract(client, sample_notification):
     response_json = return_json_from_response(_get_notification(
         client, sample_notification, '/v2/notifications/{}'.format(sample_notification.id)
     ))
     validate(response_json, get_notification_response)
 
 
+def test_get_v2_email_contract(client, sample_email_notification):
+    response_json = return_json_from_response(_get_notification(
+        client, sample_email_notification, '/v2/notifications/{}'.format(sample_email_notification.id)
+    ))
+    validate(response_json, get_notification_response)
+
+
 def test_get_api_sms_contract(client, sample_notification):
     response_json = return_json_from_response(_get_notification(
         client, sample_notification, '/notifications/{}'.format(sample_notification.id)