Lobby websocket - fix disconnect - increase ping frequency (#12806)

Lobby was upgraded recently to be on a newer version of the
server platform. Seemingly the websocket timeout has dropped
to 30 seconds. The previous keep-alive of 45 seconds was
not enough.

Changing the value to 10 seconds allows for 3 failed tries before
a disconnect.

lib/websocket-client/src/main/java/org/triplea/http/client/web/socket/WebSocketConnection.java

@@ -88,8 +88,8 @@ class WebSocketConnection {
     this.serverUri = serverUri;
     pingSender =
         Timers.fixedRateTimer("websocket-ping-sender")
-            .period(45, TimeUnit.SECONDS)
-            .delay(45, TimeUnit.SECONDS)
+            .period(10, TimeUnit.SECONDS)
+            .delay(10, TimeUnit.SECONDS)
             .task(this::sendPingTask);
     this.headers = headers;
   }