Clean up ThriftServerTest - StatusOnStartingAndStopping
Clean up ThriftServerTest - StatusOnStartingAndStopping

Summary:
The batons can just be members of `Handler` which lets us use the default constructor.

Also `server.setInternalMethods({"getStatus"})` is not needed because `server.getRejectRequestsUntilStarted()` is `false` which means the former has no effect.

Differential Revision: D30392051

fbshipit-source-id: 95deacf43be37c1739883dde12b945ec9093bccb

facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift,facebook/fbthrift