Enable SOCKS5 integration test

[crepererum]

Add some SOCKS5 proxy to our CI and enable

rskafka/tests/client.rs

Lines 118 to 122 in 3af1939

	// Disabled as currently no SOCKS5 integration tests
	#[cfg(feature = "transport-socks5")]
	#[ignore]
	#[tokio::test]
	async fn test_socks5() {

This should be gated by some environment variable like SOCKS5_ENDPOINT so that developers don't need to have a SOCKS5 proxy running locally if they don't work on that particular feature.

[mario-s]

Hi! Should the test be skipped, if the environment variable is not set?

[crepererum]

Should the test be skipped, if the environment variable is not set?

Yes, I think that would be ideal.

[mario-s]

Ok, I'd like to try my luck with this issue, you could assign it to me.

[crepererum]

Thank you 🙂.

BTW: I'll be out of office until the 16th of May, but will review any PR when I'm back.