GH-3482: parquet-hadoop tests to work behind a web proxy

[alexeyroytman]

Rationale for this change

Allow parquet-hadoop tests to work behind a web proxy. Otherwise their failures stop some other jar files from being build.

What changes are included in this PR?

Analysis of system properties https.proxyHost and https.proxyPort, and if set, use a Proxy for OkHttpClient creation.

Are these changes tested?

The ./mvn clean build now passes when I'm behind a web proxy.

Are there any user-facing changes?

No.

[Fokko]

Thanks @alexeyroytman This seems reasonable to add

[alexeyroytman]

It looks like that on CI Hadoop the JVM properties https.proxyHost and https.proxyPort are set (I don't see their values, but I suppose they are set), and this specific proxy does not allow good gzip/snappy work.
Strangely, for JDK 11 tests passed, but for JDK 17 they failed...

I'll try to work on my environment with OpenJDK 17, and if it passes, I'm planning to change the code to use different JVM properties, e.g. parquet.https.proxyHost and parquet.https.proxyPort. Thus they won't be occasionally defined for CI. And occasionally not working for certain compression method.

[alexeyroytman]

BTW, how can I find out which CI job has JVM properties https.proxyHost and https.proxyPort set ?

[alexeyroytman]

Or shall we rename the properties to something referring to github.com ?.. I mean, it's parquet, hadoop, tests/junit, and for https://github.com ...

[alexeyroytman]

I believe it shall pass CI now.