Move sample data logger to own module

lib/tasks/sample_data.rake

@@ -1,3 +1,5 @@
+require "tasks/sample_data/logging"
+
 # The sample data generated by this task is supposed to save some time during
 # manual testing. It is not meant to be complete, but we try to improve it
 # over time. How much is hardcoded here is a trade off between developer time
@@ -44,14 +46,6 @@ namespace :openfoodnetwork do
       Spree::State.count > 0
   end
 
-  module Logging
-    private
-
-    def log(message)
-      puts "[openfoodnetwork:sample_data:load] #{message}"
-    end
-  end
-
   module Addressing
     private