Windows workstation support

[gmiranda23]

Add the ability to build windows workstations for students. Adding content like so

 machine "#{name}-workstation#{i}" do
   machine_options :bootstrap_options =>{
    :image_id => "ami-f70cdd9c",
    :security_group_ids => "training-#{name}-win-workstation-sg"
   }, :is_windows => true
   recipe 'chef_workstation::windows_workstation'
   tag 'workstation'
 end

Produces this error

================================================================================
Error executing action `converge` on resource 'machine_batch[default]'
================================================================================

SocketError
-----------
getaddrinfo: nodename nor servname provided, or not known

Resource Declaration:
---------------------
# In /Users/gmiranda/Documents/Development/chef_classroom/local-mode-cache/cache/cookbooks/chef_classroom/recipes/deploy_windows_workstations.rb

 51: machine_batch do
 52:   1.upto(count) do |i|
 53:     machine "#{name}-workstation#{i}" do
 54:       machine_options :bootstrap_options =>{
 55:         :image_id => "ami-f70cdd9c",
 56:         :security_group_ids => "training-#{name}-win-workstation-sg"
 57:       }, :is_windows => true
 58:      recipe 'chef_workstation::windows_workstation'
 59:       tag 'workstation'
 60:      end
 61:   end
 62: end
 63: