The encoding parameter in json.loads has been removed in py3.9
The encoding parameter in json.loads has been removed in py3.9

It was ignored and deprecated before.

see https://docs.python.org/3/whatsnew/3.9.html#index-20:~:text=The%20encoding%20parameter%20of%20json.loads()%20has,(Contributed%20by%20Inada%20Naoki%20in%20bpo%2D39377)

Change-Id: I9cf37e1297d303e459bf9588f0493f6ca4a438c7

openstack/mistral,openstack/mistral