AttemptRepeatedly runs attempt until it returns true (succeeded => stop) or more than Attempts were executed.

Done informs the integration test that a test binary has finished.

InitTracer initializes the global tracer and returns a closer function.

LogFatal logs a critical error and exits with 1.

RepeatUntilFail runs doit() until it returns true (failed -> stop) or more than Attempts were executed.

AttemptFunc attempts a request repeatedly, receives the attempt number.