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

app/config.py

@@ -107,6 +107,7 @@ class Config(object):
     SMS_CHAR_COUNT_LIMIT = 495
     BRANDING_PATH = '/images/email-template/crests/'
     TEST_MESSAGE_FILENAME = 'Test message'
+    ONE_OFF_MESSAGE_FILENAME = 'One-off message'
     MAX_VERIFY_CODE_COUNT = 10
 
     NOTIFY_SERVICE_ID = 'd6aa2c68-a2d9-4437-ab19-3ae8eb202553'

app/dao/jobs_dao.py

@@ -53,7 +53,8 @@ def dao_get_job_by_service_id_and_job_id(service_id, job_id):
 def dao_get_jobs_by_service_id(service_id, limit_days=None, page=1, page_size=50, statuses=None):
     query_filter = [
         Job.service_id == service_id,
-        Job.original_file_name != current_app.config['TEST_MESSAGE_FILENAME']
+        Job.original_file_name != current_app.config['TEST_MESSAGE_FILENAME'],
+        Job.original_file_name != current_app.config['ONE_OFF_MESSAGE_FILENAME'],
     ]
     if limit_days is not None:
         query_filter.append(cast(Job.created_at, sql_date) >= days_ago(limit_days))