move the db follower usage to a helper

lib/travis/api/app/endpoint.rb

@@ -10,7 +10,7 @@ class Travis::Api::App
     set(:prefix) { "/" << name[/[^:]+$/].underscore }
     set disable_root_endpoint: false
     register :scoping
-    helpers :current_user, :flash
+    helpers :current_user, :flash, :db_follower
 
     # TODO hmmm?
     before { flash.clear }

lib/travis/api/app/endpoint/repos.rb

@@ -52,7 +52,7 @@ class Travis::Api::App
       #
       # json(:repository)
       get '/:owner_name/:name' do
-        Octopus.using(:follower) do
+        prefer_follower do
           respond_with service(:find_repo, params)
         end
       end

lib/travis/api/app/helpers/db_follower.rb

@@ -0,0 +1,13 @@
+require 'travis/api/app'
+
+class Travis::Api::App
+  module Helpers
+    module DbFollower
+      def prefer_follower
+        Octopus.using(:follower) do
+          yield
+        end
+      end
+    end
+  end
+end