_wait_for_msg raises empty MMQTTException when using iotcentral_device to connect to IoT Central

[garretjacobson]

Following the readme & examples of connecting to IoT Central found here I can't seem to connect successfully due to _wait_for_msg failing.

`Traceback (most recent call last):
File "code.py", line 105, in
File "/lib/adafruit_azureiot/iotcentral_device.py", line 184, in connect
File "/lib/adafruit_azureiot/iot_mqtt.py", line 434, in subscribe_to_twins
File "/lib/adafruit_azureiot/iot_mqtt.py", line 327, in _get_device_settings
File "/lib/adafruit_azureiot/iot_mqtt.py", line 465, in loop
File "/lib/adafruit_minimqtt/adafruit_minimqtt.py", line 1009, in loop
File "/lib/adafruit_minimqtt/adafruit_minimqtt.py", line 1037, in _wait_for_msg
MMQTTException:

Code done running.`

I'm using Pico W adafruit-circuitpython-raspberry_pi_pico_w-en_US-8.2.1 with adafruit-circuitpython-azureiot-8.x-mpy-2.5.15 and adafruit-circuitpython-minimqtt-8.x-mpy-7.4.1

I added back in a socket timeout removed with this specific change and it started to work again from what I've observed so far.