Rename namespace to ofn

lib/tasks/dev.rake

@@ -327,7 +327,7 @@ namespace :ofn do
 
   This task is going to be replaced by:
 
-    $ bundle exec rake openfoodnetwork:sample_data
+    $ bundle exec rake ofn:sample_data
 
   It contains more sample data.
 WARNING

lib/tasks/sample_data.rake

@@ -21,7 +21,7 @@ require "tasks/sample_data/user_factory"
 # - https://community.openfoodnetwork.org/t/seed-data-development-provisioning-deployment/910
 # - https://github.com/openfoodfoundation/openfoodnetwork/issues/2072
 #
-namespace :openfoodnetwork do
+namespace :ofn do
   desc 'load sample data for development or staging'
   task sample_data: :environment do
     raise "Please run `rake db:seed` first." unless seeded?

lib/tasks/sample_data/logging.rb

@@ -3,6 +3,6 @@ module Logging
 
   def log(message)
     @logger ||= ActiveSupport::TaggedLogging.new(Logger.new(STDOUT))
-    @logger.tagged("openfoodnetwork:sample_data:load") { @logger.info(message) }
+    @logger.tagged("ofn:sample_data") { @logger.info(message) }
   end
 end