Show difference of user resource when was created

[gongo]

Now, don't show difference of user resource when user was created.

Example:

# roles/user.rb

user 'gongo'

$ vagrant ssh default -- ls /home
vagrant

$ bundle exec itamae ssh -h default --vagrant roles/user.rb
 INFO : Starting Itamae...
 INFO : Recipe: /path/to/server/roles/user.rb 
         # <= Nothing !

$ vagrant ssh default -- ls /home
gongo
vagrant

After merged this branch:

 INFO : Starting Itamae...
 INFO : Recipe: /path/to/server/roles/user.rb
 INFO :   user[gongo] exist will change from 'false' to 'true'

[ryotarai]

Thank you!

[gongo]

Thanks 🍕