Client becomes stale when forcing to use async APIs sync. [API-2023]

[emreyigit]

Client becomes stale, most probably entering a deadlock, when style of initialization client and invoking async APIs are diverged.

var client = await HazelcastClientFactory.StartNewClientAsync(options);
var map = client.GetMapAsync<string, string>("mapname").Result;

In this case, the map never created, and client hung. Although, Task.Result is dangerous, sync usage should be provided as much as possible.