Switch to DojoTestCase for better test compatibility

Use DojoTestCase instead of plain TestCase to align with DefectDojo
testing conventions and ensure proper test setup/teardown.

Author: AbhimanyuGit2507

unittests/test_finding_group_filter_context.py

@@ -1,4 +1,3 @@
-from django.test import TestCase
 from django.utils.timezone import now
 
 from dojo.filters import FindingFilter, FindingFilterWithoutObjectLookups
@@ -13,8 +12,10 @@
     Test_Type,
 )
 
+from .dojo_test_case import DojoTestCase
 
-class TestFindingGroupFilterContext(TestCase):
+
+class TestFindingGroupFilterContext(DojoTestCase):
     """Test that Finding Group filter respects Test/Engagement/Product context."""
 
     @classmethod