Update railties/lib/rails/application/configuration.rb

Changed comment that referenced the property #database_configuration_file, now it's paths["config/database"]

railties/lib/rails/application/configuration.rb

@@ -97,7 +97,7 @@ def threadsafe!
         self
       end
 
-      # Loads and returns the contents of the #database_configuration_file. The
+      # Loads and returns the contents of the #paths["config/database"]. The
       # contents of the file are processed via ERB before being sent through
       # YAML::load.
       def database_configuration