This test expects 11 repeats of the same message emitted at intervals of
200ms; so we need more than 2 seconds to adjust for time sleep
variations and the like. So raising it to 3s here that should be
enough.
Attempting NodeRpc (or streaming node rpc) for clients that do not
support it causes it to hang indefinitely because while the TCP
connection exists, the client will never respond.
Mahmood Ali