don't expose full user info unless needed

lib/api/entities.rb

@@ -5,9 +5,13 @@ module Gitlab
              :dark_scheme, :theme_id, :blocked, :created_at
     end
+    class UserBasic < Grape::Entity
+      expose :id, :email, :name, :blocked, :created_at
+    end
+
     class Project < Grape::Entity
       expose :id, :code, :name, :description, :path, :default_branch
-      expose :owner, :using => Entities::User
+      expose :owner, :using => Entities::UserBasic
       expose :private_flag, :as => :private
       expose :issues_enabled, :merge_requests_enabled, :wall_enabled, :wiki_enabled, :created_at
     end
@@ -22,7 +26,7 @@ module Gitlab
     class ProjectSnippet < Grape::Entity
       expose :id, :title, :file_name
-      expose :author, :using => Entities::User
+      expose :author, :using => Entities::UserBasic
       expose :expires_at, :updated_at, :created_at
     end
   end