test_proto_json.py broken by new python/google/protobuf/json_format.py changes

[michaelcui1986]

Expected Behavior

test_proto_json.py passes

Current Behavior

test_proto_json.py not passes

Steps to reproduce

make test-python

Specifications

• Version:
• Platform:
• Subsystem:

Possible Solution

The cause is a new version of json_format.py from protobuf repo. Broken by protocolbuffers/protobuf@ab4585a, this added addition "path" parameter in the customized function defined in proto_json.py

[achals]

cc @tsotnet

Thanks for the report @michaelcui1986 ! I think we saw this when protobuf was upgraded unintentionally which broke stuff. That's why we decided to pin protobuf in #2480 to <3.20.