Flaky TestSignalFirstLoad

[RomanZavodskikh]

--- FAIL: TestSignalFirstLoad (0.00s)
    --- FAIL: TestSignalFirstLoad/multiple_data_clients (0.00s)
        routing_test.go:978: the first load signal was not blocking
time="2023-10-05T11:54:59Z" level=info msg="route settings, reset, route: : Path(\"/some/path/to/:id\") -> requestHeader(\"X-From\", \"skipper\") -> \"[https://www.example.org\](https://www.example.org/)""
time="2023-10-05T11:54:59Z" level=info msg="route settings received"
time="2023-10-05T11:54:59Z" level=info msg="route settings applied"

https://github.com/zalando/skipper/actions/runs/6418589985/job/17426688868?pr=2648

[AlexanderYastrebov]

--- FAIL: TestSignalFirstLoad (0.00s)
    --- FAIL: TestSignalFirstLoad/enabled (0.00s)
        routing_test.go:909: the first load signal was not blocking
    --- FAIL: TestSignalFirstLoad/enabled,_empty (0.00s)
        routing_test.go:942: the first load signal was not blocking
    --- FAIL: TestSignalFirstLoad/multiple_data_clients (0.00s)
        routing_test.go:978: the first load signal was not blocking

https://github.com/zalando/skipper/actions/runs/6527583706/job/17722615727?pr=2677

[szuecs]

--- FAIL: TestSignalFirstLoad (0.00s)
    --- FAIL: TestSignalFirstLoad/enabled,_empty (0.00s)
        routing_test.go:942: the first load signal was not blocking
time="2023-11-01T09:58:57Z" level=info msg="route settings, reset, route: : Path(\"/some/path/to/:id\") -> requestHeader(\"X-From\", \"skipper\") -> \"[https://www.example.org\](https://www.example.org/)""