Allow non privileged user vagrant to run a shell provision

plugins/provisioners/shell/config.rb

@@ -5,9 +5,11 @@ module VagrantPlugins
       attr_accessor :path
       attr_accessor :upload_path
       attr_accessor :args
+      attr_accessor :privileged
 
       def initialize
         @upload_path = "/tmp/vagrant-shell"
+        @privileged  = true
       end
 
       def validate(machine)

plugins/provisioners/shell/provisioner.rb

@@ -14,8 +14,7 @@ module VagrantPlugins
           @machine.communicate.tap do |comm|
             comm.upload(path.to_s, config.upload_path)
 
-            # Execute it with sudo
-            comm.sudo(command) do |type, data|
+            comm.execute(command, {:sudo => config.privileged}) do |type, data|
               if [:stderr, :stdout].include?(type)
                 # Output the data with the proper color based on the stream.
                 color = type == :stdout ? :green : :red