[APPS-1274][BUG] Prevent parameter names from being "name"

:koala: :bug: :+1:

We added a validation to stop people from calling their parameters "name":

https://github.com/zendesk/zendesk_app_market/issues/619
https://zendesk.atlassian.net/browse/APPS-1274

/cc @zendesk/quokka 

The format of the en.yml file seems to have changed. We just ran `rake i18n:standardize` to regenerate it after updating `config/locales/translations/zendesk_apps_support.yml`. Is this okay, @liulikun @tmcinerney?