The sync_type value in settings.yaml is not honored

[apatelKmd]

I am using the awesome forklift project as a plugin to quickly test out the Foreman. In my setup I am unable to use the sync_type option and based on the documentation I set it to sync_type: 'disabled'.
However, the above does not work and it always ends up with the default sync_type: 'rsync'. After some investigation, I managed to update the code to honor the documented value disabled.
Below is the diff of my changes which I am happy 😄 to submit a pull request.

diff --git a/vagrant/lib/forklift/box_distributor.rb b/vagrant/lib/forklift/box_distributor.rb
index c087781..fb673fe 100644
--- a/vagrant/lib/forklift/box_distributor.rb
+++ b/vagrant/lib/forklift/box_distributor.rb
@@ -240,7 +240,10 @@ module Forklift
     def configure_libvirt(machine, box, networks = [])
       machine.vm.provider :libvirt do |p, override|
         override.vm.box_url = box.fetch('libvirt') if box.fetch('libvirt', false)
-        override.vm.synced_folder '.', '/vagrant', type: @settings['sync_type'], rsync__args: ['--max-size=100m']
+
+        if @settings.key?('sync_type') and @settings['sync_type'] != 'disabled'
+          override.vm.synced_folder '.', '/vagrant', type: @settings['sync_type'], rsync__args: ['--max-size=100m']
+        end
 
         if box.fetch('bridged', false)
           override.vm.network :public_network, :dev => box.fetch('bridged'), :mode => 'bridge'