Flakey test on OSX: retry_until_after_timeout

[jszwedko]

Failure: https://github.com/timberio/vector/pull/3704/checks?check_run_id=1129767532

2020-09-17T17:16:01.2446470Z thread 'main' panicked at 'Timeout', src/test_util/mod.rs:310:5
2020-09-17T17:16:01.2446980Z stack backtrace:
2020-09-17T17:16:01.6290410Z error: test failed, to rerun pass '--lib'
2020-09-17T17:16:01.6290800Z 
2020-09-17T17:16:01.6291020Z Caused by:
2020-09-17T17:16:01.6292180Z   process didn't exit successfully: `/Users/runner/work/vector/vector/target/debug/deps/vector-30d59d8cd75cf082  --nocapture` (signal: 6, SIGABRT: process abort signal)
2020-09-17T17:16:01.6318310Z make: *** [test] Error 101
2020-09-17T17:16:01.6323890Z test test_util::tests::retry_until_after_timeout ... 
2020-09-17T17:16:01.6328800Z ##[error]Process completed with exit code 2.

Ref: #2978

[leebenson]

Hmm. test_util::tests::retry_until_after_timeout is marked with #[should_panic], so this is expected behavior. Wonder why the panic is slipping through?

[jszwedko]

Closing since this test doesn't exist anymore.