Fix unitialized money_rails constant error (#4851)

* Fix unitialized money_rails constant error

* Fix require statement file_path and edit comment

Author: coalest

config/initializers/money.rb

@@ -1,3 +1,12 @@
+# This MoneyRails::ActionViewExtension module should get loaded
+# automatically when ActionView is loaded, but *very* rarely when
+# setting up the app locally ItemHelper is loaded beforehand,
+# which depends on MoneyRails::ActionViewExtension, so without
+# this line an uninitialized constant error is raised.
+#
+# See: https://github.com/RubyMoney/money-rails/issues/614
+require "money-rails/helpers/action_view_extension"
+
 MoneyRails.configure do |config|
   # set the default currency
   config.default_currency = :usd