flakey unit test: Test_server_ClientCert/*

[michel-laterman]

Flaky Test

Effects main, example here
File here
It looks like it is where the request may get a connection refused response

Stack Trace

=== RUN   Test_server_ClientCert/valid_client_certs_no_certs_requested
--
  | server_test.go:349:
  | Error Trace:	/opt/buildkite-agent/builds/bk-agent-prod-gcp-1707490899215587797/elastic/fleet-server/internal/pkg/api/server_test.go:349
  | Error:      	Received unexpected error:
  | Get "https://localhost:36805/api/status": dial tcp 127.0.0.1:36805: connect: connection refused
  | Test:       	Test_server_ClientCert/valid_client_certs_no_certs_requested

[michel-laterman]

More logs

=== RUN   Test_server_ClientCert/valid_client_certs_no_certs_requested
--
  | server.go:175: {"level":"info","message":"server hard connection limiter disabled"}
  | server_test.go:354:
  | Error Trace:	/opt/buildkite-agent/builds/bk-agent-prod-gcp-1707983859488530268/elastic/fleet-server/internal/pkg/api/server_test.go:354
  | Error:      	Received unexpected error:
  | Get "https://localhost:45963/api/status": dial tcp 127.0.0.1:45963: connect: connection refused
  | Test:       	Test_server_ClientCert/valid_client_certs_no_certs_requested
  | FAIL: Test_server_ClientCert (3.61s)