forces nopasswd sudo for vagrant user in digitalocean
forces nopasswd sudo for vagrant user in digitalocean

ansible playbooks for staging and production clobber
the sudo additions provided by the vagrant-digitalocean plugin.
The approach added in this commit uses sudoers.d.

mark-in/securedrop-prov-upstream,mark-in/securedrop-prov-upstream,mark-in/securedrop-prov-upstream,mark-in/securedrop-prov-upstream