fixing import linting

Author: oerc0042

tests/model/test_ontology_source.py

@@ -1,8 +1,9 @@
-from isatools.model.comments import Comment, Commentable
-from isatools.model.ontology_source import OntologySource
 from unittest import TestCase
 from unittest.mock import patch
 
+from isatools.model.comments import Comment, Commentable
+from isatools.model.ontology_source import OntologySource
+
 
 class TestOntologySource(TestCase):
     def setUp(self):