[Improve] Catch the log when running the test service

[RobertIndie]

Currently, there is no log when running the test service. We cannot get the log from the test broker. It's inconvenient to debug the failed tests.

[tisonkun]

Is this issue still relevant? If you can provide some background like where is the related code, I suppose it can be a good first issue :D

[BewareMyPower]

@tisonkun When running unit tests, only the client side logs are shown. The logs of Pulsar standalone are not caught. It could be better to upload the server side logs for debugging.