bugfix: windows file failed to initialize with new symlink handler

[arlimus]

Fixes:

inspec> f=file('c:\Users\vagrant')
ArgumentError: wrong number of arguments (2 for 3)
from /Users/apop/.chefdk/gem/ruby/2.1.0/gems/r-train-0.11.1/lib/train/extras/file_windows.rb:14:in `initialize'

[alexpop]

Fixes the issue:

inspec> f=file('C:\Users\vagrant')
=> File C:\Users\vagrant
inspec> f.path
=> "C:\\Users\\vagrant"
inspec> f.directory?
=> true
inspec> f.basename
=> "vagrant"
inspec> f.exist?
=> true

Thanks for the quick turnaround Dom!

[alexpop]

These appveyor failure seems to be related to bundler issue 4472

[alexpop]

Thanks Dom!