Convert - dashes to _ underscores when parsing CLI arg extra globals.

mlos_bench/mlos_bench/tests/launcher_parse_args_test.py

@@ -260,9 +260,12 @@ def test_launcher_args_parse_3(config_paths: List[str]) -> None:
         " ".join([f"--config-path {config_path}" for config_path in config_paths])
         + f" --config {config_file}"
         + f" --globals {globals_file}"
+        + " --max-suggestions 10"  # check for - to _ conversion too
     )
     launcher = _get_launcher(__name__, cli_args)
 
+    assert launcher.optimizer.max_suggestions == 10  # from CLI args
+
     # Check that CLI file parameter overrides JSON config:
     assert isinstance(launcher.scheduler, SyncScheduler)
     # from test-cli-config.jsonc (should override scheduler config file)