Add sudoers.d vagrant policy to avoid nfs password prompts

Create the sudoers.d directory, update /etc/sudoers, and create
/etc/sudoers.d/vagrant to alleviate the need to enter a sudo password on
each vagrant run.
Move create_vagrant_sudoers_policy from initialize to nfs_cleanup
Raise an exception if an action fails within create_vagrant_sudoers_policy

Since we are dealing with the sudoers file we want to ensure that we are
defensive against any action shelling out failing on a host machine.
Bump version to 1.0.10
Merge pull request #1 from bmhatfield/bsd-sudoers

Add sudoers.d vagrant policy to avoid nfs password prompts