FIX reload! within rails console --sandbox causes undefined method rollback...

FIX reload! within rails console --sandbox causes undefined method rollback upon exiting [https://github.com/rails/rails/issues/11834]

activerecord/lib/active_record/railties/console_sandbox.rb

 ActiveRecord::Base.connection.begin_transaction(joinable: false)
 
 at_exit do
+  if ActiveRecord::Base.connection.transaction_open?
     ActiveRecord::Base.connection.rollback_transaction
+  end
 end