fix: set proxy server in config file

[dstaesse]

The proxy option was not parsed in the config file.

Closes #

Proposed Changes

Briefly describe your proposed changes:

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• pytest tests completes successfully
• Commit messages are in semantic format
• Sign CLA (if not already signed)

[codecov-commenter]

Codecov Report

Merging #283 (adcb7be) into master (2a0bd82) will decrease coverage by 0.03%.
The diff coverage is 66.66%.

❗ Current head adcb7be differs from pull request most recent head e3aaecd. Consider uploading reports for the commit e3aaecd to get more accurate results

@@            Coverage Diff             @@
##           master     #283      +/-   ##
==========================================
- Coverage   92.42%   92.38%   -0.04%     
==========================================
  Files          27       27              
  Lines        2165     2168       +3     
==========================================
+ Hits         2001     2003       +2     
- Misses        164      165       +1     

Impacted Files	Coverage Δ
influxdb_client/client/influxdb_client.py	97.50% <66.66%> (-0.59%)	⬇️

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[dstaesse]

I had a bit of a headache today figuring out why I couldn't connect to my InfluxDB server from behind a proxy. I fixed it for the config.ini, but I would also take into account http_proxy and HTTP_PROXY environment variables if they are set, with lower precedence (these are now ignored) Since there are some options how to deal with that, I'll leave that one up to you guys.

[bednar]

Thanks for your PR 👍

Could you please satisfy next requirements before we merge the PR into master:

1. Add test for proxy configuration: https://github.com/dstaesse/influxdb-client-python/blob/adcb7bed4428bab5937c6bea2131628839f924c1/tests/test_InfluxDBClient.py#L65
2. Sign CLA:

[dstaesse]

Sure.

[dstaesse]

I looked for a valid proxy configuration for the integration tests, but it looks like there is no test yet for the proxy feature as a whole...
Adding that is a bit beyond the scope of my intended contribution here...

[bednar]

Adding that is a bit beyond the scope of my intended contribution here...

Your test: test_init_from_file_proxy is quite enough. Thx

[bednar]

@dstaesse thanks again for your PR! 👍 Let's merge it into master.