Update how pending virus check Zendesk tickets are created

This updates the tickets that are created when the
`check_if_letters_still_pending_virus_check` scheduled task detects
letters in the `pending-virus-check` state.

tests/app/celery/test_scheduled_tasks.py

@@ -1,10 +1,13 @@
 from collections import namedtuple
 from datetime import datetime, timedelta
 from unittest import mock
-from unittest.mock import call
+from unittest.mock import ANY, call
 
 import pytest
 from freezegun import freeze_time
+from notifications_utils.clients.zendesk.zendesk_client import (
+    NotifySupportTicket,
+)
 
 from app.celery import scheduled_tasks
 from app.celery.scheduled_tasks import (
@@ -364,7 +367,11 @@ def test_check_job_status_task_does_not_raise_error(sample_template):
 @freeze_time("2019-05-30 14:00:00")
 def test_check_if_letters_still_pending_virus_check(mocker, sample_letter_template):
     mock_logger = mocker.patch('app.celery.tasks.current_app.logger.error')
-    mock_create_ticket = mocker.patch('app.celery.nightly_tasks.zendesk_client.create_ticket')
+    mock_create_ticket = mocker.spy(NotifySupportTicket, '__init__')
+    mock_send_ticket_to_zendesk = mocker.patch(
+        'app.celery.scheduled_tasks.zendesk_client.send_ticket_to_zendesk',
+        autospec=True,
+    )
 
     create_notification(template=sample_letter_template,
                         status=NOTIFICATION_PENDING_VIRUS_CHECK,
@@ -391,11 +398,15 @@ def test_check_if_letters_still_pending_virus_check(mocker, sample_letter_templa
             Notifications: {}""".format(id_references)
 
     mock_logger.assert_called_once_with(message)
-    mock_create_ticket.assert_called_with(
-        message=message,
+    mock_create_ticket.assert_called_once_with(
+        ANY,
         subject='[test] Letters still pending virus check',
-        ticket_type='incident'
+        message=message,
+        ticket_type='incident',
+        technical_ticket=True,
+        ticket_categories=['notify_letters']
     )
+    mock_send_ticket_to_zendesk.assert_called_once()
 
 
 @freeze_time("2019-05-30 14:00:00")