hello test should confirm message appears in logs

```
it should "indicates this action is successfully called" in {
val run = wsk.action.invoke(helloAction, Map())
withActivation(wsk.activation, run) {
activation =>
activation.response.success shouldBe true
}
}
```

should be amended to check the logs as well.

Start from the hello action test shown in the issue and identify where its invocation and activation details are asserted. Extend the test to inspect the action logs and confirm the expected hello message appears; the issue does not specify the exact log text or test file.

Written by the indexing model from the issue text.