Update nodepool settings to live ones

Match the live configuration
Cleanup nodepool template

The ready-scripts aren't needed but can be found in git history
if we do need.
Fix the providers up for th-mysql image

Somehow the provider name was missing
Add support for debug nodes

When something goes wrong we can debug it by requesting the job
to run on a specific node we could be logged into and watching.

Typically this would be triggered in the experimental queue