Cygwin boxes do not pass verification with serverspec

[misheska]

The existing test that checks for a vagrant user doesn't pass on the cygwin boxes (but is fine for the openssh boxes), need to sort out what is going on. This is what you see when the test runs against a cygwin box:

==> default: Running provisioner: serverspec...
F

Failures:

1. windows box should have a vagrant user
   Failure/Error: expect(user 'vagrant').to exist
   sudo id vagrant
   expected User "vagrant" to exist

   /Users/misheska/github/box-cutter/windows-vm/test/windows_spec.rb:5:in `block (2 levels) in <top (required)>'

Finished in 3.98 seconds
1 example, 1 failure

Failed examples:

rspec /Users/misheska/github/box-cutter/windows-vm/test/windows_spec.rb:4 # windows box should have a vagrant user