fix 313 load request unit test

Author: hallvictoria

azure_functions_worker_v1/tests/unittests/test_handle_event.py

@@ -80,7 +80,7 @@ async def test_function_load_request(
         handle_event.protos = test_protos
         worker_request = WorkerRequest(name='function_load_request',
                                        request=Request(FunctionRequest(
-                                           function_id=123,
+                                           function_id="123",
                                            metadata=Metadata(
                                                script_file=BASIC_FUNCTION_DIRECTORY,
                                                entry_point=BASIC_FUNCTION_DIRECTORY,

azure_functions_worker_v1/tests/utils/mock_classes.py

@@ -24,7 +24,7 @@ class FunctionRequest:
     def __init__(self, capabilities: Optional[Any] = {},
                  function_app_directory: Optional[Any] = "",
                  environment_variables: Optional[Any] = {},
-                 function_id: Optional[Any] = 123,
+                 function_id: Optional[Any] = "123",
                  metadata: Optional[Any] = {}):
         self.capabilities = capabilities
         self.function_app_directory = function_app_directory