Remove vcloud-provisioner repo

It's been moved to the attic.

/cc @samjsharpe
Remove vcloud-templates repo

The 'vagrant-govuk' repo no longer uses it as of
alphagov/vagrant-govuk@530ff06da4142f7739dce2d64fa6cbd74eaac7bd.

We're now using 'govuk-provisioning' to provision GOV.UK VMs.

/cc @samjsharpe @robyoung @alexmuller
Remove old vcloudtools repo

It has been superseded by the [vCloud
Tools](http://gds-operations.github.io/vcloud-tools/) gems.

/cc @jabley