Added name attribute to top of metadata
Foodcritic cleanups

FC043: Prefer new notification syntax: cookbook-keystone/recipes/server.rb:53
FC043: Prefer new notification syntax: cookbook-keystone/recipes/server.rb:105
FC043: Prefer new notification syntax: cookbook-keystone/recipes/server.rb:120
corrected spacing on the FC wont fix comment
Added OS supports

Didn't have the correct list currently supported in attributes.