Omit empty lines in Puppet provisioner output

The sudo() block and/or the Puppet provisioner often returns newline
characters as separate strings. This makes the chomp() ineffective and
results in extraneous spacing between the output lines.

Separate out the call to chomp() so that we only do it once. Then only
output info if that line is not an empty string.

plugins/provisioners/puppet/provisioner/puppet.rb

@@ -159,7 +159,8 @@ module VagrantPlugins
                                :manifest => @manifest_file)
 
           env[:machine].communicate.sudo(command) do |type, data|
-            env[:ui].info(data.chomp, :prefix => false)
+            data.chomp!
+            env[:ui].info(data, :prefix => false) if !data.empty?
           end
         end
 

plugins/provisioners/puppet/provisioner/puppet_server.rb

@@ -71,7 +71,8 @@ module VagrantPlugins
 
           env[:ui].info I18n.t("vagrant.provisioners.puppet_server.running_puppetd")
           env[:vm].channel.sudo(command) do |type, data|
-            env[:ui].info(data.chomp, :prefix => false)
+            data.chomp!
+            env[:ui].info(data, :prefix => false) if !data.empty?
           end
         end
       end