Add fix for error in vagrant-aws
Add fix for error in vagrant-aws

Provisioning failed with the error:
No host IP was given to the Vagrant core NFS helper. This is
an internal error that should be reported as a bug.

Workaround is to disable NFS: https://github.com/mitchellh/vagrant/issues/5401#issuecomment-115240904
`override.nfs.functional = false`

sealuzh/cloud-workbench,sealuzh/cloud-workbench,sealuzh/cloud-workbench