Ignore one-off messages in job list on dashboard

Same as how we ignore ‘send yourself a test’ messages (see:
d8467bfc3c). The dashboard gets clogged
up with one off messages otherwise, which affects:
- performance
- users ability to find their jobs

tests/app/dao/test_jobs_dao.py

@@ -1,5 +1,6 @@
 from datetime import datetime, timedelta
 from functools import partial
+import pytest
 import uuid
 
 from freezegun import freeze_time
@@ -334,13 +335,24 @@ def test_get_jobs_for_service_is_paginated(notify_db, notify_db_session, sample_
     assert res.items[1].created_at == datetime(2015, 1, 1, 7)
 
 
-def test_get_jobs_for_service_doesnt_return_test_messages(notify_db, notify_db_session, sample_template, sample_job):
+@pytest.mark.parametrize('file_name', [
+    'Test message',
+    'One-off message'
+])
+def test_get_jobs_for_service_doesnt_return_test_messages(
+    notify_db,
+    notify_db_session,
+    sample_template,
+    sample_job,
+    file_name,
+):
     test_job = create_job(
         notify_db,
         notify_db_session,
         sample_template.service,
         sample_template,
-        original_file_name='Test message')
+        original_file_name=file_name,
+    )
 
     jobs = dao_get_jobs_by_service_id(sample_job.service_id).items