Remove puppetlabs repo, fixes TRAINVM-80.

I’ve removed the puppetlabs-enterprise-extras to fix TRAINVM-80. We’ve
removed it from the rest of the material since it is no longer needed.
Merge pull request #243 from shrug/master

(maint) Remove --compress option from ovftool
Merge pull request #242 from klynton/master

Remove puppetlabs repo, fixes TRAINVM-80.
Fixes TRAINVM-73.

Disable the check for updates and telemetry in the training vm.
Merge branch 'master' of https://github.com/puppetlabs/puppetlabs-training-bootstrap

* 'master' of https://github.com/puppetlabs/puppetlabs-training-bootstrap:
  (maint) Remove --compress option from ovftool
Merge pull request #244 from klynton/master

Fixes TRAINVM-73