test: Add tests for RPC help

test/functional/test_runner.py

@@ -152,6 +152,7 @@ BASE_SCRIPTS = [
     'p2p_node_network_limited.py',
     'feature_blocksdir.py',
     'feature_config_args.py',
+    'rpc_help.py',
     'feature_help.py',
     # Don't append tests at the end to avoid merge conflicts
     # Put them in a random line within the section that fits their approximate run-time