Correct Vagrant sudoers line (as per http://docs.vagrantup.com/v2/boxes/base.html)

The difference is that now vagrant user can sudo to all users without passwords.
Merge remote-tracking branch 'jedi4ever/master' into vagrant-sudoers
Debian 7.7.0-amd64-netboot template
Merge pull request #1009 from lucianop/vagrant-sudoers

Vagrant passwordless sudo to all users
Merge pull request #1010 from lucianop/debian-7.7.0-amd64-netboot

Debian 7.7.0-amd64-netboot template
Merge branch 'master' of github.com:jedi4ever/veewee