Adding kitchen and chefspec and fixing package noop

I was getting an error where the php-fpm package ended up being '' (the empty string) because the test to set it in the recipe uses `nil?` and playing with irb will show you:

```ruby
''.nil?
# false
''.empty?
# true
```

if you doubt the changes, you need only revert the change to the attributes file and try using rspec or kitchen.