Add support for managing sudoers access across machines

This includes the saz/sudo module and defines a difference in sudoer needs
between OSUOSL managed machines and those outside of the OSUOSL datacenter,
which won't have an `osuadmin` account on them

[FIXED INFRA-17]
Merge pull request #10 from rtyler/issue/sudoers-17

Add support for managing sudoers access across machines