fix enroll and reenroll relationship

enrollments-events/tests/events/test_reenroll_if_failed.py

@@ -30,19 +30,19 @@ def test_reenroll(
     assert app.lambda_handler(event, lambda_context)  # type: ignore
 
     # Parent knows the child
-    child_entity = dynamodb_persistence_layer.collection.get_item(
+    current_entity = dynamodb_persistence_layer.collection.get_item(
         KeyPair(
             pk=parent_id,
             sk='LINKED_ENTITIES#ENROLLMENT#CHILD',
         )
     )
-    assert child_entity
+    assert current_entity
 
     # Child knows the parent
-    parent_entity = dynamodb_persistence_layer.collection.get_item(
+    new_entity = dynamodb_persistence_layer.collection.get_item(
         KeyPair(
-            pk=child_entity['enrollment_id'],
+            pk=current_entity['enrollment_id'],
             sk='LINKED_ENTITIES#ENROLLMENT#PARENT',
         )
     )
-    assert parent_entity['enrollment_id'] == parent_id
+    assert new_entity['enrollment_id'] == parent_id