Avoid further wait period after reconnect timeout occurs

When reconnect timer expires an additional waiting period of half the
timeout period is seen. Skip this extra waiting period when timeout
is detected and perform the connect attempt right away. This change
makes configured reconnect timeout value MQTT_RECONNECT_TIMEOUT_MS
accurate.

mqtt_client.c

@@ -845,6 +845,7 @@ static void esp_mqtt_task(void *pv)
                     client->state = MQTT_STATE_INIT;
                     client->reconnect_tick = platform_tick_get_ms();
                     ESP_LOGD(TAG, "Reconnecting...");
+                    break;
                 }
                 vTaskDelay(client->wait_timeout_ms / 2 / portTICK_RATE_MS);
                 break;