Turn of ESP8266 acess point before starting WiFi

Start only in station mode and not the default combined access point and station mode, like when starting with MQTT in MyGatewayTransportMQTTClient.cpp

libraries/MySensors/core/MyGatewayTransportEthernet.cpp

@@ -101,6 +101,8 @@ bool gatewayTransportInit() {
 	_w5100_spi_en(true);
 	#if defined(MY_GATEWAY_ESP8266)
 		#if defined(MY_ESP8266_SSID)
+			// Turn off access point
+			WiFi.mode (WIFI_STA);
 			(void)WiFi.begin(MY_ESP8266_SSID, MY_ESP8266_PASSWORD);
 			#ifdef MY_IP_ADDRESS
 				WiFi.config(_ethernetGatewayIP, gateway, subnet);