Update oracle_client.py to enable_http_proxy

[pbk0]

Line 35 anyway makes an insecure channel and expects that users are on a safe network. But it still uses https urls and some corporate environments try to verify certificates (as in my case) and it breaks. So adding the second line instead of the first worked in my case and ends up using http links.

# original
channel = grpc.insecure_channel(f"{ip_addr}:{port}")
# update to this
channel = grpc.insecure_channel(f"{ip_addr}:{port}", options=(('grpc.enable_http_proxy', 0),))

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (92d713a) 98.37% compared to head (895503f) 98.37%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #981 +/- ## ======================================= Coverage 98.37% 98.37% ======================================= Files 50 50 Lines 3085 3085 ======================================= Hits 3035 3035 Misses 50 50 ```

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