show-controller output updates

[Richard Harding]

show-controller should match up to show-model where there's a "name" key that outputs the controller's name.

With that in play, the root key with tsthe controller name is redundant and we can de-nest the entire output and it's still valid YAML

Accounts in show-controller should output the ACL for the users in the output

Accounts should only be available to the admin of the controller and not for anyone that can read the data.

The ca-cert should only be available to the adin of the controller.

I don't think we need the current-model in the accounts section of the show-controller. I'm not sure what this is useful for.