Test Correlation Id string support for BLS (#6963)

* Test Correlation Id string support for BLS

qa/L0_backend_python/argument_validation/models/argument_validation/1/model.py

@@ -1,4 +1,4 @@
-# Copyright 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+# Copyright 2022-2024, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
@@ -88,9 +88,38 @@ def test_infer_request_args(self):
                 requested_output_names=requested_output_names,
                 inputs=inputs,
                 model_name=model_name,
-                correleation_id=None,
+                correlation_id=None,
             )
 
+        # correlation_id set to an integer
+        infer_request_test = pb_utils.InferenceRequest(
+            requested_output_names=requested_output_names,
+            inputs=inputs,
+            model_name=model_name,
+            correlation_id=5,
+        )
+        self.assertIsInstance(infer_request_test.correlation_id(), int)
+        self.assertEqual(infer_request_test.correlation_id(), 5)
+
+        # correlation_id set to string
+        infer_request_test = pb_utils.InferenceRequest(
+            requested_output_names=requested_output_names,
+            inputs=inputs,
+            model_name=model_name,
+            correlation_id="test_str_id-5",
+        )
+        self.assertIsInstance(infer_request_test.correlation_id(), str)
+        self.assertEqual(infer_request_test.correlation_id(), "test_str_id-5")
+
+        # correlation_id default
+        infer_request_test = pb_utils.InferenceRequest(
+            requested_output_names=requested_output_names,
+            inputs=inputs,
+            model_name=model_name,
+        )
+        self.assertIsInstance(infer_request_test.correlation_id(), int)
+        self.assertEqual(infer_request_test.correlation_id(), 0)
+
         # request_id set to None
         with self.assertRaises(TypeError) as e:
             pb_utils.InferenceRequest(