fix: flaky test because of unique username issue, reseed to address

backend/benefit/applications/tests/test_ahjo_integration.py

@@ -38,6 +38,7 @@
 from applications.tests.factories import ApplicationFactory, DecidedApplicationFactory
 from calculator.models import Calculation
 from calculator.tests.factories import PaySubsidyFactory
+from common.tests.conftest import reseed
 from common.utils import hash_file
 from companies.tests.factories import CompanyFactory
 from helsinkibenefit.tests.conftest import *  # noqa
@@ -216,16 +217,22 @@ def test_generate_composed_template_html(mock_pdf_convert):
     )
 
 
+# Test flaking if no reseed is used
 def test_export_application_batch(application_batch):
+    reseed(12345)
     application_batch.applications.add(
         DecidedApplicationFactory.create(
             status=ApplicationStatus.ACCEPTED,
             calculation__calculated_benefit_amount=1000,
         )
     )
+
+    reseed(23456)
     application_batch.applications.add(
         DecidedApplicationFactory.create(status=ApplicationStatus.REJECTED)
     )
+
+    reseed(34567)
     application_batch.applications.add(
         DecidedApplicationFactory.create(status=ApplicationStatus.CANCELLED)
     )
@@ -239,6 +246,7 @@ def test_export_application_batch(application_batch):
         ).count()
         + 4
     )
+    reseed(777)
 
 
 @patch("applications.services.ahjo_integration.pdfkit.from_string")