update config.sample to fix repository_folder default

config/environments/config.rb.sample

@@ -49,6 +49,7 @@ LinkedData.config do |config|
   config.replace_url_prefix            = true
   config.rest_url_prefix               = REST_URL_PREFIX.to_s
   config.sparql_endpoint_url = "http://sparql.bioontology.org"
+  config.repository_folder            = REPOSITORY_FOLDER.to_s
 #  config.enable_notifications          = false
 
     config.interportal_hash = {