This commit introduces a proper reboot cap for Windows guests. Once it
initiates a reboot on the guest, it calls out to the wait_for_reboot cap
to block on until the guest is finished rebooting.
- Fixed typo in helper test
- Removed extraneous machine.config prefix from Windows guest config validation
- Added WinRM communicator unit tests
- Added Windows guest capability unit tests
Brian Cain
Seth Vargo
Shawn Neal