Use unique AccessPoint name

[brainelectronics]

Relates to brainelectronics/Micropython-ESP-WiFi-Manager#15

In case more than one device uses this lib, it is hard to connect to the desired device as all have the same AccessPoint name.

Create the MyEVSE AccessPoint with a unique name based on the unique ID function of micropython-modules

[brainelectronics]

if all modules are of the same batch they only differ of course in the last digits only. Call function

MyEVSE-Webinterface/myevse_webinterface/webinterface.py

Line 528 in 7ab6d2e

GenericHelper.get_uuid(4).decode('ascii'))

as follows

GenericHelper.get_uuid(-4).decode('ascii'))