Search normalised in get_notifications_for_service:

* Use dao method to search against normalised(recipient)
* Add filter to accept one or more statuses

tests/app/conftest.py

@@ -446,7 +446,8 @@ def sample_notification(
     sent_by=None,
     client_reference=None,
     rate_multiplier=1.0,
-    scheduled_for=None
+    scheduled_for=None,
+    normalised_to=None
 ):
     if created_at is None:
         created_at = datetime.utcnow()
@@ -484,7 +485,8 @@ def sample_notification(
         'sent_by': sent_by,
         'updated_at': created_at if status in NOTIFICATION_STATUS_TYPES_COMPLETED else None,
         'client_reference': client_reference,
-        'rate_multiplier': rate_multiplier
+        'rate_multiplier': rate_multiplier,
+        'normalised_to': normalised_to
     }
     if job_row_number is not None:
         data['job_row_number'] = job_row_number