[redis] update to match chef-redis 2.0 attributes

In redis 2.0 we renamed these attributes.
https://github.com/miah/chef-redis/blob/master/attributes/config.rb#L8-L9
[redis] make sure the proper init script is generated
Merge pull request #131 from ChrisLundquist/patch-1

[redis] update to match chef-redis 2.0 attributes