Terraform 0.12.x compatibility

[sammcj]

Currently this repo only works with legacy Terraform 0.11.x versions, it should be updated for Terraform 0.12.x.

[morgante]

The principles should be the same, you'd just need to use a Terraform 0.12 image and config.

[sammcj]

I thought the modules in the repo also needed some updates to work with 0.12.x but maybe my memory is failing me and it was just the version pinning that had to be updated...

Regardless, an official training module probably shouldn’t be recommending people install 0.11 anyway.