Fixed custom model name for single deployment. (#1274)

Author: lu-ohai

ads/aqua/modeldeployment/deployment.py

@@ -965,8 +965,7 @@ def _create(
             # adds `--enable_lora` to parameters
             params_dict.update({"--enable_lora": UNKNOWN})
             params = build_params_string(params_dict)
-
-        if create_deployment_details.model_name and "--served-model-name" in params:
+        elif create_deployment_details.model_name and "--served-model-name" in params:
             # Replace existing --served-model-name argument with custom name provided by user
             params = re.sub(
                 r"--served-model-name\s+\S+",

tests/unitary/default_setup/model_deployment/test_model_deployment_v2.py

@@ -922,7 +922,7 @@ def test_update(
         model_deployment = self.initialize_model_deployment()
         model_deployment.dsc_model_deployment.id = "test_model_deployment_id"
         update_model_deployment_details = (
-            model_deployment._update_model_deployment_details()
+            model_deployment._update_model_deployment_details(update_type="ZDT")
         )
         model_deployment.update(wait_for_completion=True)
         mock_create.assert_called()