Make conf.d loading at boot more reliable

[benhylau]

1 of 10 times nodes would not process everything in conf.d. For example, config doesn't get picked up and the SSID shows as test2 occasionally. Perhaps we just need to increase the wait time for the SD, but this could be unrelated because sometimes there are partial proessing (e.g. SSID and hostname get picked up from conf.d but some .sh did not execute.

[hamishcoleman]

can you collect details about this.

As it stands, there is basically nothing that can be done

[benhylau]

I will be working with mesh orange a lot over next two weeks and capture logs whenever I boot. Hopefully I run into it often enough.