find solution for wifi credential defaults

[kaspar030]

Currently, our examples fail to build if laze decides WiFi is the network of choice, but no wifi credentials are given via env.

Examples should not build fail, on any platform. So, find some solution.

Options identified:

• provide some default credentials
• provide some always-incorrect default credentials
• provide some user workstation dependent credentials
• don't build

[bergzand]

Another option would be to make the wifi credentials fully optional at build time, and only connect to wifi if credentials are supplied.